SPW Model Libraries 

A Comprehensive Set of DSP Model Libraries for Designing and Analyzing Communications Systems 

The SPW DSP model libraries accelerate the design, modeling, and verification of complete systems within an operational context. It lets you quickly assemble executable models of digital signal processing algorithm systems that you can test and refine to develop innovative solutions optimizing cost and performance using the SPW tool.

 
Synopsys has been producing end-to end physical layer baseband simulation models of second and third generation wireless standards for quite some time. Synopsys continues to track the evolving standards and uses information from standards committees to build system-level models. The models, in turn, provide a framework and a testbench for users interested in hardware and/or software implementation. SPW comes with more than 3,000 models already in the base package, plus LTE-specific solutions as an Add-on. Libraries include, among others, the following:
Available DSP Model Libraries
  • LTE/LTE-A Library (Add-on option)
  • LTE Library for Xilinx IP (Add-on option)
  • Communications Library (included in base package)
  • WCDMA (3GPP) Library (included in base package)
  • TD-SCDMA Library (included in base package)
  • GSM/GPRS/EDGE Library (included in base package)
  • WiMAX Library (included in base package)
  • CDMA2000 (3GPP2) Library (included in base package)
  • WLAN/WPAN Library (included in the base package)

The SPW Basic Communications Library is a pre-built collection of commonly used communication functions, including basic capabilities like modulators, demodulators, adaptive equalizers, wireless channel models and other blocks created to take advantage of the latest wireless technologies. Demonstration systems (e.g. DVB-T and IS54 for TDMA) and a rich selection of channel models (e.g. the Saleh and Rappaport indoor radio channels, the Rayleigh flat and selective fading channels, and the Rummler Multipath channel) are included in this library. Also included are functions for radar, RF, and smart antenna systems.

Helps You Utilize Emerging Technologies
The Communications Library contains modulators and demodulators, adaptive equalizers, wireless channel models and other blocks created to take advantage of the latest wireless technologies. These blocks are ideal for designing personal communications systems and networks, mobile communications systems, satellite systems, radar system, and other indoor and outdoor wireless systems. Two digital cellular demonstration systems (TDMA and CDMA) are provided, which you can use as tutorials or as starting places for your own designs. The TDMA system is based on the IS-54 digital cellular standard for the United States. The CDMA system implements full PN sequence acquisition and tracking using orthogonal Walsh codes. DVB-T demo system based on OFDM is also provided with a practical channel estimation model included.

Offers a Wide Selection of Channel Models
Renowned for their accuracy, the sixteen channel blocks of the SPW Communications Library reveal how transmitter and receiver proximity and environment can influence signal quality. Particularly useful are the Saleh and Rappaport indoor radio channels, the Rayleigh flat and selective fading channels, and the Multipath (Rummler) channel. Custom channels can be modeled with the Sparse FIR filter block. This block allows you to implement time varying and time-invariant models based on calculated data, measured data or statistics. Constant or dynamic tap coefficients and tap spacing can be specified from a file or generated statistically. The channel models also include special timing drift (clock skew) blocks for more true-to-life simulations. These blocks accurately model synchronization discrepancies between transmitter and receiver clocks by producing an output which slowly drifts from the input signal. Faster timing disparities can be simulated via the jitter input of a timing drift block.

LTE / LTE-A Physical Layer Simulation Library
The LTE / LTE-A Physical Layer Simulation Library is a set of ready-to-use simulation systems providing an executable specification of the 3GPP standard. Verified against Rohde & Schwarz signal generators, it provides an unmatched increase in productivity for wireless physical layer system design.

Use cases include network operators investigating the system performance both for scenarios specified in the standard as well as in corner cases relevant to optimizing network performance and cost. For basestation design teams as well as handset modem design teams, the LTE / LTE-A library provides a reference model for validation of their specifications. The source code provides very valuable insight into the standards definition, which may otherwise require months of reviewing written standards documents. The source code can also be used as a starting point for today’s mostly processor-based implementations of wireless systems.

The reference models support both FDD and TDD modes and provide both ideal receivers (with perfect knowledge of the channel) and non-ideal receivers (which must estimate the channel characteristics). The ideal receiver provides the best achievable performance for comparison against real, non-ideal receiver implementations.

The LTE / LTE-A Physical Layer Simulation Library is organized into specific regression testbenches which mirror the tests specified in the standards reference documents. The user can immediately run these regressions and easily modify system parameters of interest in order to study performance impact in any scenario. By replacing or modifying blocks or subsystems, the user can quickly adapt the reference model to the specific implementation for their end product. The ability to efficiently deploy compute farms directly from the development environment provides wireless designers using the LTE / LTE-A library with unmatched exploration opportunities resulting in improved product performance within their time-to-market window.

The LTE / LTE-A Physical Layer Simulation Library can be used for block-level verification of hardware and software components. HDL co-simulation as well as target code simulation--either on the host or using an Instruction Set Simulator (ISS) for the target processor--enables the use of the library as a verification environment.

The LTE / LTE-A Physical Layer Simulation Library is validated against Rohde & Schwarz signal generators and available references from the standard test equipment as well as with leading customers.

The LTE / LTE-A Physical Layer Simulation Library is available for SPW and System Studio.

Highlights
  • End-to-end physical layer (baseband) simulation model
  • Supports the design of 3GPP LTE Rel.8 and Rel.10 standard-based products
  • Conforms to current standards for 3GPP LTE / LTE-A
  • Verified against Rohde & Schwarz signal generators
  • Includes ideal and non-ideal receivers to serve as reference models
  • Provides several LTE/ LTE-A system testbenches for throughput analysis
  • Enables automated configuration of Rohde & Schwarz signal generators
  • Provides all models in hierarchical block diagrams
  • Source code available for leaf-level blocks
  • Enables co-simulation of C, C++, HDL, and/or MATLAB blocks in a single simulation process
    • SPW Library for Xilinx LTE IP
      Xilinx provides IP components that allow base station manufacturers to reduce implementation time for LTE systems implemented on Xilinx programmable devices. The implementation of these IP components is optimized for device performance such as power consumption and resource utilization.

      The SPW Library for Xilinx LTE IP provides function- and bit-accurate reference models for these IP components, which can be instantiated into SPW right away. This allows users to evaluate the system throughput using Xilinx IP in conjunction with their own LTE IP and algorithms, The SPW LTE library can then be used as the system testbench.

      Code-division multiple access, or CDMA, technology is the foundation for many modern wireless communications systems.

      WCDMA Library
      To assist engineers designing Wideband CDMA (WCDMA) systems, Synopsys has developed a WCDMA library for SPW. Use of the WCDMA library expedites your design of WCDMA systems by facilitating algorithmic exploration and shortening development and design verification times, increasing your chance of first-time design success. You can combine WCDMA library models with other SPW models. For example, by combining WCDMA models with models from SPW’s multimedia library, a designer can quickly build advanced 3G wireless designs which include multimedia (video) features.

      Highlights
      • Supports the design of 3GPP Wideband CDMA (WCDMA) products
      • Includes a rich set of models of fundamental CDMA functions such as sequence generation, spreading and despreading operations
      • Provides several CDMA and WCDMA system testbenches
      • Includes fixed-point algorithmic design capture and datapath performance analysis
      • Conforms to current standards for 3GPP WCDMA
      • Accelerates complete design of a 3G wireless personal device when used with optional SPW Libraries such as the WLAN library for IEEE802.11, and Bluetooth Compatible with the SPW Multimedia Library for the development of 3G systems that incorporate imaging/video subsystems such as a digital camera, video compression routines, and/or video display.

      The SPW GSM Library provides ten system models along with over 200 GSM specific leaf and hierarchical blocks. Blocks from the SPW Communications library are used to complete the models.

      The blocks in the GSM Library include many of the fundamental functional blocks needed for modeling the physical layer processing of GSM/GPRS/EDGE systems, including blocks for channel coding, synchronization, framing, modulation, and channel and sequence estimation.

      The SPW GSM reference models make extensive use of hierarchy to make them easy to understand. This also makes the models excellent design libraries since it is simple to replace low level blocks with custom implementations and test.

      Highlights
      • Supports the design of GSM/GPRS/EDGE products
      • Includes a rich set of libraries of fundamental GSM channels such as Half Rate (TCH/HS), Full Rate (TCH/FS), Enhanced Full Rate (TCH/EFS), adaptive Multi-Rate (AMR) Full Rate, and AMR Half Rate, vocoder models, control channels such as BCCH, RACH, SACCH and FACCH
      • Includes GSM Circuit Switched Data (CSD) Channels such as Full Rate (TCH/F14.4, TCH/F9.6, TCH/F4.8, TCH/F2.4), Half Rate (TCH/H4.8, TCH/H2.4), and the Enhanced Circuit Switch Traffic Channel (E-TCH/F28.8, E-TCH/F32.0, E-TCH/F43.2)
      • Includes GPRS packet channels with coding schemes from CS-1 to CS-4, and EGPRS packet channels with coding schemes from MCS-1 to MCS-9
      • Includes both GMSK and 8-PSK modulation schemes and supports channels with mixtures of both
      • Conforms to EDGE standards with increased data rates up to 450 kbps with Enhanced Modulation
      • Accelerates complete design of a 2.5G/3G wireless personal device when used with optional SPW libraries such as the WLAN Library for IEEE802.11 and Bluetooth
      • Compatible with the SPW Multimedia Design Kit for the development of 2.5G to 3G systems that incorporate imaging/video subsystems such as a digital camera, video compression, and/or video display


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