Digital Synthesizers and Transmitters for Software Radio (Hardcover)

Description

The approach adopted in Digital Synthesizers and Transmitters for Software Radio will provide an understanding of key areas in the field of digital synthesizers and transmitters. It is easy to include different digital techniques in the digital synthesizers and transmitters by using digital signal processing methods, because the signal is in digital form. By programming the digital synthesizers and transmitters, adaptive channel bandwidths, modulation formats, frequency hopping and data rates are easily achieved. Techniques such as digital predistortion for power amplifier linearization, digital compensation methods for analog I/Q modulator nonlinearities and digital power control and ramping are presented in this book. The flexibility of the digital synthesizers and transmitters makes them ideal as signal generators for software radio. Software radios represent a major change in the design paradigm for radios in which a large portion of the functionality is implemented through programmable signal processing devices, giving the radio the ability to change its operating parameters to accommodate new features and capabilities. A software radio approach reduces the content of radio frequency (RF) and other analog components of traditional radios and emphasizes digital signal processing to enhance overall transmitter flexibility. Software radios are emerging in commercial and military infrastructure.

Table of Contents

Preface.- List of Abbreviations.- 1. Transmitters.- 2. Power Amplifier Linearization.- 3. Digital Compensation Methods for Analog I/Q Modulator Errors.- 4. Direct Digital Synthesizers.- 5. Recursive Oscillators.- 6. Cordic Algorithm.- 7. Sources Of Noise and Spurs in DDS.- 8. Spur Reduction Techniques in Sine Output Direct Digital Synthesizer.- 9. Blocks of Direct Digital Synthesizers.-10. Current Steering D/A Converters.- 11. Pulse Shaping and Interpolation Filters.- 12. Re-Sampling.- 13. FIR Filters for Compensating D/A Converter Frequency Response Distortion.- 14. A Direct Digital Synthesizer with Tunable Delta Sigma Modulator.-15. A Digital Quadrature Modulator with On-Chip D/A Converter.- 16. A GSM/EDGE/WCDMA Modulator with Onchip.- D/A Converter for Base Stations.- 17. Effect of Clipping in Wideband CDMA System and Simple Algorithm for Peak Windowing.- 18. Reducing Peak to Average Ratio of Multicarrier GSM and Edge Signals.- 19. Appendix: Derivation of the Lagrange Interpolator.- Index.

描述

《數位合成器和軟體無線電發射器》採用的方法將幫助讀者了解數位合成器和發射器領域的關鍵領域。通過使用數位信號處理方法，可以輕鬆地在數位合成器和發射器中包含不同的數位技術，因為信號是以數位形式存在的。通過編程數位合成器和發射器，可以輕鬆實現自適應通道帶寬、調製格式、頻率跳躍和數據速率。本書介紹了功率放大器線性化的數位預失真、模擬I/Q調製器非線性的數位補償方法，以及數位功率控制和斜坡控制等技術。數位合成器和發射器的靈活性使其成為軟體無線電的信號發生器的理想選擇。軟體無線電代表了無線電設計範式的重大變革，其中大部分功能是通過可編程信號處理設備實現的，使無線電能夠改變其操作參數以適應新功能和能力。軟體無線電方法減少了傳統無線電的射頻（RF）和其他類比組件的內容，並強調數位信號處理以增強整體發射器的靈活性。軟體無線電正在商業和軍事基礎設施中崛起。

目錄

前言- 縮寫列表- 1. 發射器- 2. 功率放大器線性化- 3. 模擬I/Q調製器錯誤的數位補償方法- 4. 直接數位合成器- 5. 遞迴振盪器- 6. Cordic算法- 7. DDS中的噪聲和雜散源- 8. 正弦輸出直接數位合成器中的雜散減少技術- 9. 直接數位合成器的模塊- 10. 電流轉換器- 11. 脈衝整形和插值濾波器- 12. 重新取樣- 13. 用於補償D/A轉換器頻率響應失真的FIR濾波器- 14. 具有可調節Delta Sigma調製器的直接數位合成器- 15. 具有片上D/A轉換器的數位正交調製器- 16. 具有片上D/A轉換器的GSM/EDGE/WCDMA調製器- 17. 寬頻CDMA系統中剪切的影響和峰值窗口的簡單算法- 18. 減少多載波GSM和Edge信號的峰值對平均比- 19. 附錄：拉格朗日插值器的推導- 索引。