JPL's Wireless Communication Reference Website Chapter: Analog and Digital Transmission Section: Spread Spectrum

BER of a DS/FH CDMA System employing MFSK Modulation

This section describes the BER performance of a hybrid Direct-Sequence Frequency-Hopping Spread Spectrum Communication System which applies the 16-FSK modulation technique. The derivation will be done using the WISSCE system definition as an example. We will first focus on the different phenomena that cause a degradation of the Signal to Noise Ratio (SNR) before despreading at the input of the A/D converter (pre-detection SNR). Thereafter we address the relation of this pre-detection SNR with the BER in the case of a static channel and multi-path channels. How the FH hit-chance and so the choice of Frequency-Hopping sequences influences the BER is described separately.  

• Degradation of the data detection SNR
  • Influences of non-ideal despreading
  • Influences of Multi-Access Interference
• Performance analysis in a Static Channel
• Performance analysis in a Multi-Path Channel
• Conclusions

• BER in a non-fading channel: m file
• BER in a Rician channel: m file

Related pages on this CD ROM

• Non-cellular, ad hoc network
  • Packet radio
  • WISSCE concept
  • ALOHA protocol for random access, analysis of an infinitely extended area with terminals randomly transmitting messages
  • Throughput-delay of DS-CDMA random access network with collision resolution
• Cellular network with base station access to backbone
  • BER in fading channels
  • BER in cellular networks
  • Cellular Broadband CDMA for indoor multimedia networks.

JPL's Wireless Communication Reference Website © Jack P.F. Glas (Author) and Jean-Paul M.G. Linnartz (Editor), 1993, 1995, 1999