JPL's Wireless Communication Reference Website

Chapter: Analog and Digital Transmission Section: Spread Spectrum

BER of a DS/FH CDMA System employing MFSK Modulation

contributed by Jack Glas, Lucent.

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.  

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