Agilent N7600A Signal Studio for 3GPP W-CDMA with HSDPA/HSUPA

Transcription

1 Agilent N7600A Signal Studio for 3GPP W-CDMA with HSDPA/HSUPA Technical Overview The N7600A Signal Studio for W-CDMA with HSDPA/HSUPA simplifies complex Arb-based waveform creation with its intuitive graphical user interface (GUI) and its broad collection of W-CDMA test signals. Quickly configure a signal using predefined test models, predefined waveform setups, or predefined standard channel setups. For specialized waveforms, use the intuitive GUI to set waveform parameters, which also include user-defined data. Use either a single carrier or a multicarrier signal for both downlink and uplink. Because the software supports test solutions for 3G and evolving 3.5G signals, it is well suited for both development and manufacturing environments. The primary use for this software is component testing, but its flexibility also provides limited receiver testing. Free 14-Day Trial Download the software today to investigate the signal creation capability and generate test signals using a free 14-day trial license. After the trial license expires, each vector signal generator must be licensed separately to play back waveforms created by the software. For more information, visit: Key Features full API control open-loop transmit diversity HSDPA channels HSUPA channels 16-carrier support multicarrier timing and phase offsets multicarrier clipping six-dpdch capability user-defined data marker control N5120A Baseband Studio for CPRI RE Test support E4438C ESG vector signal generator support E8267D PSG vector signal generator support

2 Introduction Feature Description Supported method Frequency Division Duplex [FDD] 3GPP W-CDMA, HSDPA, and HSUPA Supported version 3GPP Release 6, version Transmit diversity Open loop antenna 1 and 2 Coding level Supports physical layer coding (spreading and scrambling) Waveform length 10 ms continuously repeated Filters Standards-based Baseband clipping Pre- and Post-FIR Data types PN9, random, paging indicator, user-defined Standards-based setups Test models 1 through 5 Number of carriers 16 Number of channels per 512 carrier Downlink channels CPICH, PSCH, SSCH,P-CCPCH, S-CCPCH, PICH,DPCH, OCNS, HS-SCCH,HS-PDSCH, E-AGCH, E-RGCH, E-HICH Uplink channels DPCCH, DPDCH, HS-DPCCH, E-DPCCH, E-DPDCH Waveform File Exporting The software lets you export encrypted waveform files to your PC. After exporting the file, you can download the file to any signal generator licensed for the N7600A software. CPRI testing Build waveforms for CPRI RE test solutions. When properly licensed, the N5120A Baseband Studio for CPRI RE Test uses then7600a s exported waveform file to create signals. To use the file with the N5120A software, simply create an association between the N5120A software and the exported N7600A waveform file. Configure multicarrier downlink and uplink 3GPP W-CDMA test signals with the proper stress level to exercise components, including combiners, filters, and amplifiers. Use these signals for base station and mobile tests ranging from the component level to the system level; however, they are primarily intended for the component test industry. To simplify signal setup, the software provides preconfigured channel setups. Downlink Uplink Figure 1 Downlink and uplink preconfigured channel setups. 2

3 Waveform Playback The N7600A software takes advantage of the ESG and PSG baseband generators 80-MHz I/Q bandwidth by allowing for carrier offsets of ±37.5 MHz. This offset limit fully accommodates 16 carriers. ESGs and PSGs configured with Option 602 (baseband generator with 64 megasamples of RAM) accommodate large waveform files for playback. The software downloads the waveform into the signal generator s volatile memory. After downloading, the signal generator sends the waveform samples through a reconstruction filter and then an I/Q modulator. Because these signals are primarily intended for component test, the software does not implement full channel coding. Instead, when the signal generator plays the waveform, it produces partially coded signals that are statistically equivalent to fully coded signals. This means that the signal stresses amplifiers and other components exactly the same as if using a fully coded signal. Figure 2 This graphic shows a ten-carrier setup that uses the signal generator s 80 MHz I/Q bandwidth (±37.5 MHz frequency offset range). 3

4 Feature Summary Multicarrier capability Stress active components. Configure up to 16 carriers, with each carrier having the same or a unique channel configuration, frequency offset, and power offset. To ensure that a device under test experiences actual operating conditions, the Signal Studio for 3GPP W-CDMA with HSDPA/HSUPA provides settings for generating uncorrelated signals, which are important for creating realistic crest factors. Make relative carrier adjustments using the following settings: timing offset starting phase scramble code clipping level Channel editing Easily modify channel configurations. Modify the W-CDMA downlink by changing parameters such as data rate, data pattern, orthogonal variable spreading factor [OVSF] code, power, timing offset, TFCI bits, TFCI power, TPC bits, TPC power, pilot bits, pilot power, scramble code, scramble type, scramble offset, and the E-RGCH and E-HICH signature sequence patterns. Modify the W-CDMA uplink by changing parameters such as data rate, data pattern, OVSF code, power, TFCI bits, TPC bits, FBI bits, ACK/NACK, and CQI. Preconfigured channel setups Quickly generate 3GPP standard signals. Test models 1 through 5 are predefined for testing transmitter components. test model 1 ACLR, spurious emissions and intermodulation test model 2 output power dynamics test model 3 peak code domain power test model 4 EVM measurements test model 5 EVM measurements for base stations supporting HS-PDSCH Also access other predefined configurations or save and recall custom channel configurations. Selectable filtering options Quickly select and configure commonly used filters. Choose a root Nyquist, Nyquist, Gaussian, or rectangular filter. Configure the filter response using the alpha and BbT values. Flexible baseband clipping Reduce signal stress on power amplifiers. Clip the peak-to-average power of signals before or after baseband FIR filtering. Clip the signal before filtering to smooth any discontinuities in the resulting signal that can generate distortion. Clip the signal after FIR filtering to simulate a base station that operates in this mode. Code Domain power, CCDF curve, and waveform graphs Quickly check signal statistics. Save time by using the provided graphs to check a waveform prior to downloading into a signal generator or exporting the waveform file to your PC. Use the code domain power graph to visually check the channel configuration and the relative channel power. Use the CCDF curve to view the peak-to-average ratio or the power statistics of the waveform as compared to a Gaussian reference, or a previous signal s plot. Use the waveform graph to check the composite waveform s spectrum, power, and I/Q signal. 4

5 Feature Summary (Cont d) Transmit diversity Evaluate receiver performance with open loop transmit diversity. Transmit diversity is a technique used to counter the effects of fading by transmitting an altered version of the W-CDMA signal through a second antenna. The multicarrier feature of the software enables you to configure both antennas on one waveform (2 carriers), or any combination of antennas (one and two) using up to 16 carriers in a single waveform. The primary and secondary synchronization channels employ transmit switched time diversity (TSTD); most of the other channels use space time transmit diversity (STTD). HSDPA and HSUPA Test components to 3.5G standards. Set the signal for higher data rates along with HARQ and CQI features. The provided E-HICH and E-RGCH incorporate signature sequence selections that determine the supported signature hopping patterns. Use the E-DPDCH and E-DPCCH to simulate data and feedback information to base station components. API control Remotely set all software parameters. Included with the software is a full API. Use the API to set parameters either programmatically or by using an API graphical user interface. System configuration wizard Choose the interface connection for your equipment. When you run the software, the system configuration wizard provides simple choices to quickly configure the hardware you wish to use. You also have the choice of selecting simulated hardware, which enables you to configure the software without actually connecting hardware to your PC. You can change hardware configurations at any time, and as often as you wish. You can also save hardware setups for future use, and recall previously saved setups. Downlink and Uplink Features Multicarrier Number of carriers Frequency offset [per carrier] Offset resolution Carrier power [per carrier] Clipping Primary scramble code Initial phase Number of channels Coding level Frame duration Filters None Nyquist, root Nyquist Gaussian Rectangle I/Q mapping Clipping Clip location Clipping type Clipping range Markers Up to 16 within an 80 MHz bandwidth [user defined, individually configurable] Up to ± 37.5 MHz 1 Hz 40 db to 0 db- Clip each carrier before or after FIR filtering [applied to each channel in the carrier] 0 to 149 in increments of 512 chips [applied to each channel in the carrier] 0 to 359 degrees [set the phase for each carrier] Up to 512 per carrier Supports physical layer coding 10 ms a = 0 to 1 BbT = 0 to 1 Normal, Invert Pre- or post-fir filter I+jQ 10% to 100% [Clip the modulation level to a percentage of full scale. A level of 100% equates to no clipping.] 4 preconfigured or user definable markers 5

6 Downlink Features Transmit diversity Modulation Open loop QPSK and 16QAM a Primary scramble code Pre-defined channel configurations Test model 1 with 16, 32, or 64 DPCH Test model 2 Test model 3 with 16 or 32 DPCH Test model 4 Test model 5 with 2, 4, or 8 HS-PDSCH a 1 DPCH 3 DPCH PCCPCH + SCH PCCPCH + SCH + 1 DPCH PCCPCH + SCH + 3 DPCH Common Pilot Channel [CPICH] Primary Synchronization Channel [PSCH] Secondary Synchronization Channel [SSCH] Primary Common Control Physical Channel [P-CCPCH] Secondary Common Control Physical Channel [S-CCPCH] TFCI TFCI power Number of pilot bits Page Indication Channel [PICH] 15, 30, 60, 120, 240, 480, 960 ksps 0 to 149 [in increments of 256 chips] 0 to 1023, or disable TFCI bits in the carrier 20 to 20 db relative to channel 0, 8, or 16 Paging indicator [18 bit paging pattern], a 16QAM is supported for the HS-PDSCH. 6

7 Downlink Features (Cont d) Dedicated Physical Channel [DPCH] TFCI TFCI power TPC TPC power Number of pilot bits Pilot power Orthogonal Channel Noise Simulator [OCNS] TFIC TPC High Speed Shared Control Channel [HS-SCCH] 7.5, 15, 30, 60, 120, 240, 480, 960 ksps 0 to 1023, or disable TFCI bits in the carrier 20 to 20 db relative to channel 0 to 7FFF hex -20 to 20 db relative to channel 2, 4, 8, or db to 20 db 7.5, 15, 30, 60, 120, 240, 480, 960 ksps 0 to 1023, or disable TFCI bits in the carrier 0 to 7FFF hex 0 to 127 Fixed to 30 ksps High Speed Physical Downlink Shared Channel [HS-PDSCH] Fixed to 240 ksps [all data choices use 16QAM modulation] E-DCH Absolute Grant Channel [E-AGCH] E-DCH Relative Grant Channel [E-RGCH] E-DCH Hybrid ARQ Indicator Channel [E-HICH] 0 to 127 Fixed to 30 ksps 0 to 39 [signature sequences] 0 to 127 Fixed to 30 ksps 0 to 39 [signature sequences] 7

8 Uplink Features Modulation OCQPSK [HPSK] Pre-defined channel configurations 1 DPCCH DPCCH + 1 DPDCH DPCCH + 2 DPDCH DPCCH + 3 DPDCH DPCCH + 4 DPDCH DPCCH + 5 DPDCH DPCCH + 6 DPDCH DPCCH + 6 DPDCH + 1 HS-DPCCH DPCCH + 1 DPDCH + 1 HS-DPCCH + 1 E-DPCCH + 2 E-DPDCH DPCCH + E-DPCCH + 4 E-DPDCH 0 to [FFFFFF hex], common for all channels Dedicated Physical Control Channel [DPCCH] I/Q axis TFCI TPC Data Number of FBI bits FBI bit value Fixed to Q 0 to 1023, or disable TFCI bits 0 to 7FFF hex Random, and user defined 0, 1, or 2 00, 01, 10, 11 Dedicated Physical Data Channel [DPDCH] I/Q axis 15, 30, 60, 120, 240, 480, 960 ksps I or Q Random, and user defined E-DCH Dedicated Physical Control Channel [E-DPCCH] I/Q axis Data Fixed to I Random, and user defined E-DCH Dedicated Physical Data Channel [E-DPDCH] I/Q axis Signal Generator Features 15, 30, 60, 120, 240, 480, 960, 1920 ksps I or Q Random, and user defined High Speed Dedicated Physical Control Channel [HS-DPCCH] I/Q axis ACK/NACK setting CQI I or Q ACK, NACK, PRE, POST 0 TO 30 The software user interface enables you to set the following signal generator parameters. Output on/off Signal I/Q ALC Attenuation Marker control RF, modulation, Dual ARB Frequency, amplitude Modulation filter and attenuation, offsets, scaling quadrature skew, automatic DC I/Q calibration, BBG Reference BW, level Hold, power search ALC hold, ALT power, burst pulse modulation, marker polarity 8

9 Recommended Configurations for Signal Studio for 3GPP W-CDMA with HSDPA/HSUPA RF waveform downloads Model/option Description N7600A-203 N7600A-101 a E4438C b E4438C-005 E4438C-1E5 E4438C-403 E4438C-503 E4438C-602 c Signal Studio for W-CDMA License E4438C ESG ESG vector signal generator 6 GB internal hard drive High-stability time base Calibrated noise (AWGN) 250 khz to 3 GHz frequency range Internal baseband generator (64 MSa memory) a The signal generator requires Option 001, 002, 601, or 602. b E4438C requires firmware revision C or later. Download firmware updates from c Earlier baseband Options 001 and 002 are also supported Microwave waveform downloads Model/option N7600A-203 N7600A-102 a E8267D b E8267D-005 E8267D-403 E8267D-520 E8267D-602 Description Signal Studio for W-CDMA License E8267D PSG PSG vector signal generator 6 GB internal hard drive Calibrated noise (AWGN) 250 khz to 20 GHz frequency range Internal baseband generator (64 MSa memory) a The signal generator requires Option 601 or 602. b E8267D requires firmware revision C or later. Download firmware updates from Other signal generator configurations are available. For details regarding the E4438C ESG and the E8267D PSG option structure, refer to the Configuration Guide listed in the Related Literature section. 9

10 PC Requirements Item Description PC class 2 GHz Pentium 4 processor Memory 256 MB (1.0 GB recommended) Hard drive space 200 MB Display 1024 x 768 (1280 x 1024 recommended) Operating system Windows 2000 (SP4 or later) or Windows XP (SP1 or later) Required Software Microsoft.NET Framework 1.1 SP1 Microsoft Internet Explorer 5.01 or later Agilent IO libraries version M or later a a If you have a National Instrument (NI) GPIB interface card, you must install the NI GPIB library. The Agilent IO library works with the NI GPIB library. Connectivity Information and Software Options The N7600A software supports signal generator connections using GPIB or LAN and requires the Agilent I/O libraries. You can download the libraries from the Agilent web site The software uses connectivity options to enable waveform downloads to a signal generator. The following table shows the option structure for this product: Option N7600A-203 N7600A-101 N7600A-102 Description Basic W-CDMA FDD with HSDPA and HSUPA a License E4438C ESG License E8267D PSG a Required option. 10

11 Related Literature Product information Agilent E4438C Vector Signal Generator, Brochure, Literature number EN Agilent E4438C Vector Signal Generator, Data Sheet, Literature number EN Agilent E4438C Vector Signal Generator, Configuration Guide, Literature number EN Agilent E8267D Vector Signal Generator, Brochure, Literature number EN Agilent E8267D Vector Signal Generator, Data Sheet, Literature number EN Agilent E8267D Vector Signal Generator, Configuration Guide, Literature number EN Application notes Digital Modulation in Communication Systems-An Introduction, Literature number E Testing and Troubleshooting Digital RF Communications Transmitter Designs, Literature number E Testing and Troubleshooting Digital RF Communications and Receiver Designs, Literature number E Designing and Testing W-CDMA User Equipment, Literature number E Designing and Testing W-CDMA Base Stations, Literature number E Characterizing Digitally Modulated Signals with CCDF Curves, Literature number E 11

12 Additional Product Information For more information about Signal Studio software and Baseband Studio products including release notes, user interface descriptions, tutorials, and installation information, read the online documentation at the following websites: Signal Studio Software Baseband Studio Products Web Resources For more information, visit: Get the latest information on the products and applications you select. Agilent Technologies Tests and Measurement Support, Services, and Assistance Agilent Technologies aims to maximize the value you receive, while minimizing your risk and problems. We strive to ensure that you get the test and measurement capabilities you paid for and obtain the support you need. Our extensive support resources and services can help you choose the right Agilent products for your applications and apply them successfully. Every instrument and system we sell has a global warranty. Support is available for at least five years beyond the production life of the product. Two concepts underlie Agilent s overall support policy: Our Promise and Your Advantage. Our Promise Our Promise means your Agilent test and measurement equipment will meet its advertised performance and functionality. When you are choosing new equipment, we will help you with product information, including realistic performance specifications and practical recommendations from experienced test engineers. When you receive your new Agilent equipment, we can help verify that it works properly and help with initial product operation. Your Advantage Your Advantage means that Agilent offers a wide range of additional expert test and measurement services, which you can purchase according to your unique technical and business needs. Solve problems efficiently and gain a competitive edge by contracting with us for calibration, extra-cost upgrades, out-of-warranty repairs, and onsite education and training, as well as design, system integration, project management, and other professional engineering services. Experienced Agilent engineers and technicians worldwide can help you maximize your productivity, optimize the return on investment of your Agilent instruments and systems, and obtain dependable measurement accuracy for the life of those products. Agilent T&M software and Connectivity Agilent s Test and Measurement software and connectivity products, solutions and developer network allows you to take time out of connecting your instruments to your computer with tools based on PC standards, so you can focus on your tasks, not on your connections. For more information, visit Contacting Agilent For more information on Agilent Technologies products, applications or services, please contact your local Agilent office. The complete list is available at: Phone or Fax United States: (tel) (fax) Canada: (tel) (fax) Japan: (tel) (81) (fax) (81) Korea: (tel) (080) (fax) (080) Other Asia Pacific Countries: (tel) (65) (fax) (65) tm_ap@agilent.com Contacts revised: 4/25/05 Windows is a U.S. registered trademark of the Microsoft Corporation. Microsoft is a U.S. registered trademark of the Microsoft Corporation. Pentium is a U.S. registered trademark of Intel Corporation. China: (tel) (fax) Europe: (tel) Latin America: (tel) (305) Taiwan: (tel) (fax) Product specifications and descriptions in this document are subject to change without notice. Agilent Technologies, Inc Printed in USA, January 19, EN