Frequency Hopping Communication System Research Articles

Frequency-hopping multiple-access communications with concatenated diversity/Reed-Solomon coding

Multiple-access capability of a frequency-hopped spread-spectrum communication system employing the concatenated diversity/Reed-Solomon code is investigated. We present general asymptotic expressions for the achievable region and the normalised throughput. For the case of finite block length codes, a fairly accurate approximation to the achievable region, subjected to the constraint that the packet error on a given link is no greater than P∩E, has been derived. Both side information and no side information cases are considered.

Coding for Frequency-Hopped Spread-Spectrum Communication with Partial-Band Interference--Part II: Coded Performance

The performance of codes in a frequency-hopped spreadspectrum communication system with partial-band interference is investigated. The performance measure considered is the decoded bit error probability. A simplified interference model and worst-case partial-band Gaussian noise interference model is considered with the interference noise statistically independent of the transmitted signal. We consider soft decision receivers with side information and hard decision receivers with and without side information.

Error Performance Analyses of Differential Phase-Shift-Keyed/Frequency-Hopping Spread-Spectrum Communication System in the Partial-Band Jamming Environments

This paper presents a complete analysis for the derivation of the probability of error for a hypothetical pure frequency-hopping (FH) spread-spectrum communication system, employing a binary differential phase-shift-keyed (DPSK) modulation and differentially coherent demodulation, in a partial-band jamming environment. The postulated DPSK/FH spread-spectrum system could be a practical system if the operational environment is multipath free. The optimum partial-band and wide-band jamming performance measures are obtained and compared under certain parametric conditions on the communicator's power levels. The present analysis is based on the application of the author's recent results on the derivation of the probability density functions (pdf) for the output of a cross correlator with arbitrary bandpass inputs of different power levels.

Optimization of the Processing Gain of an FSK-FH System

It is desired to determine the performance of a noncoherent FSK frequency-hopped spread spectrum communication system using MARK and SPACE tones which are not necessarily orthogonal, and in addition using an error-correction code to reduce the susceptibility of the system to jammer-induced errors. The overall bandwidth of the system (i.e., the spread bandwidth) will be held constant so that the processing gain of the system will always be adjusted to maintain this constant bandwidth as other factors (e.g., the bandwidth expansion due to the error correction coding) change the underlying baseband bandwidth.