Testing and Troubleshooting digital RF communications Receiver designs

sunoosun

【文件名】:06529@52RD_Receiver Testing 5968-3579E.pdf
【格　式】:pdf
【大　小】:290K
【简　介】:
【目　录】:



Page
1 Introduction
2 1. Digital Radio Communications Systems
3 1.1 Digital Radio Transmitter
3 1.2 Digital Radio Receiver
3 1.2.1 I/Q Demodulator Receiver
4 1.2.2 Sampled IF Receiver
4 1.2.3 Automatic Gain Control (AGC)
5 1.3 Filtering in Digital RF Communications Systems
6 2. Receiver Performance Verification
Measurements
6 2.1 General Approach to Making Measurements
7 2.2 Measuring Bit Error Rate (BER)
8 2.3 In-Channel Testing
8 2.3.1 Measuring Sensitivity at a Specified BER
9 2.3.2 Verifying Co-Channel Rejection
9 2.4 Out-of-Channel Testing
9 2.4.1 Verifying Spurious Immunity
10 2.4.2 Verifying Intermodulation Immunity
11 2.4.3 Measuring Adjacent and Alternate Channel
Selectivity
14 2.5 Fading Tests
14 2.6 Best Practices in Conducting Receiver Performance
Tests
Page
15 3. Troubleshooting Receiver Designs
15 3.1 Troubleshooting Steps
15 3.2 Signal Impairments and Ways to Detect Them
16 3.2.1 I/Q Impairments
17 3.2.2 Interfering Tone or Spur
17 3.2.3 Incorrect Symbol Rate
18 3.2.4 Baseband Filtering Problems
19 3.2.5 IF Filter Tilt or Ripple
19 3.3 Table of Impairments Versus Parameters Affected
20 4. Summary
20 5. Appendix: From Bit Error Rate (BER) to
Error Vector Magnitude (EVM)
22 6. Symbols and Acronyms
23 7. References
Table of Contents