RECOMMENDATION ITU-R SM.1055-0* (1994) THE USE OF SPREAD SPECTRUM TECHNIQUES
Scope
Keywords
ANNEX 1  Spread spectrum techniques
TABLE OF CONTENTS
1. Introduction
2. Spread spectrum signal types
3. Signal-to-noise (S/N) performance of DS and FH systems
4. Signal-to-interference performance
5. Spectrum efficiency
ANNEX 2 Examples of band sharing by employing spread spectrum techniques
TABLE OF CONTENTS
1. Introduction
2. Factors to consider in band sharing
3. Example 1 – Interference from SS systems to conventional voice systems
     3.1 General
     3.2 Protection ratios
          3.2.1 Systems, signals, and performance levels
          3.2.2 Direct-sequence signals
          3.2.3 Frequency-hopping signals
          3.2.4 Signal-to-interference ratios
     3.3 Minimum required propagation loss
     3.4 Measurement data
          3.4.1 Signal-to-interference (S/I) protection ratios
          3.4.2 Minimum propagation loss
          3.4.3 Summary
     3.5 Conclusion
4. Example 2 – Interference from SS systems to the television broadcast service
     4.1 General
     4.2 Frequency hopping signals
     4.3 Signal-to-interference (S/I) protection ratios
          4.3.1 Co-channel interference
          4.3.2 Adjacent channel interference
     4.4 Conclusion
5. Summary
6. Calculation of minimum required propagation loss
ANNEX 3 Procedures for analysing spread spectrum interference to conventional receivers
TABLE OF CONTENTS
1. Introduction
2. General approach
3. Response waveform considerations
     3.1 Noise-like response, continuous in time
     3.2 Response continuous in amplitude and time
     3.3 Impulsive and burst responses
4. Procedures for determining Îm
     4.1 General
     4.2 Procedure used for DS emissions
     4.3 Procedure used for FH/DS emissions
          4.3.1 Digital receivers
          4.3.2 AM voice receivers
          4.3.3 FM voice receiver
     4.4 Procedure used with FH and FH/DS emissions
          4.4.1 Digital receivers
          4.4.2 AM voice receivers
          4.4.3 FM voice receiver
5. Conclusions