Understanding and Enhancing Sensitivity in Receivers for Wireless Applications

zsd2009

Figure 1. Homodyne (Zero-IF) Receiver ............................................................................................... 5

Figure 2. Dual-Conversion Superheterodyne Receiver ......................................................................... 6

Figure 3. User Time Slots for TDMA Example ...................................................................................... 8

Figure 4. Frequency Channels for FDMA Example............................................................................... 8

Figure 5. Modulation Schemes .......................................................................................................... 11

Figure 6. Constellation Diagram (I/Q Plot) .......................................................................................... 12

Figure 7. OQPSK State Diagram ....................................................................................................... 13

Figure 8. p/4-DQPSK State Diagram.................................................................................................. 14

Figure 9. 16QAM State Diagram........................................................................................................ 15

Figure 10. Receiver Components ........................................................................................................ 16

Figure 11. Mixer Driven by LO Signal .................................................................................................. 21

Figure 12. I/Q Detector........................................................................................................................ 24

Figure 13. Complex Source Connected to Complex Conjugate Load Termination ................................. 25

Figure 14. Thermal Noise Visualized as Signal Generators .................................................................. 26

Figure 15. Filter Response Equated to Brick-Wall Filter Response........................................................ 27

Figure 16. Two-Port Network Connection for Available Gain Definition.................................................. 29

Figure 17. Available Thermal Noise (Noise Temperature)..................................................................... 30

Figure 18. Noise Output Power Versus Source Temperature (Noise Temperature) ............................... 31

Figure 19. Available Thermal Noise (Noise Figure)............................................................................... 32

Figure 20. Noise Output Power Versus Source Temperature (Noise Figure) ......................................... 33

Figure 21. Noise Figure Quantifies Signal-to-Noise Ratio Degradation.................................................. 34

Figure 22. Amplifier With 10 dB of Gain and a 5-dB Noise Figure ......................................................... 36

Figure 23. Two-Stage Network (Cascaded Noise Temperature)............................................................ 38

Figure 24. Cascaded Receiver System (Cascaded Noise Temperature) ............................................... 39

Figure 25. Two-Stage Network (Cascaded Noise Figure) ..................................................................... 40

Figure 26. Cascaded Receiver System (Cascaded Noise Figure) ......................................................... 41

Figure 27. Lossy Two-Port (Noise Figure) ............................................................................................ 42

Figure 28. Mixer Conversion Noise...................................................................................................... 44

Figure 29. Single-Sideband Mixer Noise Model .................................................................................... 45

Figure 30. Double-Sideband Mixer Noise Model................................................................................... 46

Figure 31. Dual-Conversion Receiver With Associated Noise and Signal Levels ................................... 47

Figure 32. Dual-Conversion Receiver and Carrier-to-Noise Ratio.......................................................... 48

Figure 33. Probability of Error Versus Carrier-to-Noise Ratio ................................................................ 49

Figure 34. Double-Sideband Phase Noise Plot of a Signal Source........................................................ 50

Figure 35. Conversion Limitations Due to Phase Noise ........................................................................ 51

Figure 36. Ideal Two-Port Pout Versus Pin Characteristic ....................................................................... 52

Figure 37. Two-Port Gain Versus Input Power Level ............................................................................ 53

Figure 38. Receiver Circuits and Intermodulation Distortion.................................................................. 54

Figure 39. Output Power Pout for One Fundamental Frequency Signal Versus Input Power Pin............... 56

Figure 40. Fundamental Po
and Third-Order Distortion Pd Output Powers Versus Input Power Pin.......... 57

Figure 41. Typical Output Spectrum of a Two-Port Receiver Network ................................................... 59

Figure 42. Cascaded Receiver Networks ............................................................................................. 59

Figure 43. Dynamic Range.................................................................................................................. 61

Figure 44. Receiver Blocking............................................................................................................... 62

Figure 45. Spur-Free Dynamic Range.................................................................................................. 63

Figure 46. High-Side Injection Example ............................................................................................... 65

Figure 47. Half-IF Spur........................................................................................................................ 66

Figure 48. Frequency Spectrum for RF and LO Frequencies .............................................................. 66

Figure 49. Receiver Block Diagram ..................................................................................................... 68

Figure 50. Six-Stage Network Combined Into Three-Stage Network ....................................................68

Figure 51. New Combined Receiver .................................................................................................... 69

资料对理解接收机还是比较有帮助的，属于基础类。

hnwulei

清华微所PLL大牛李宇根教授2013讲义

waveguides

讲义？书？搞不清楚了

cndeusa

这到底是什么东东啊

yxy7968

貌似不大得文档，比较基础

supersmellycat

下载下来看看

yxy7968

TI的文档

gtimes

感谢楼主分享！！！！

fwutsairlin

thanks!

smith0908

感謝大大分享，謝謝你。