Effects of Non-Uniform Windowing on the Performance of a Fast Frequency- Hopped Noncoherent MFSK Receiver Over Rician Fading Channels with Partial-Band Interference and Doppler Shift
Abstract
An error probability analysis is done for a DFT based, M-ary frequency-shift keying (MFSK) communications system employing fast frequency- hopped spread spectrum signals. A linear combination procedure referred to as noise-normalization is employed at the receiver to minimize the effects of partial-band interference, which is modeled as additive Gaussian noise. The performance of the receiver is studied as a function of signal Doppler shift and type of windowing used in the DFT. The use of fast frequency-hopped spread spectrum is found to improve the performance of the DFT based receiver in all but the most severe cases of Doppler shift. The use of a non-uniform window (i. e., a Hamming window) to improve receiver performance is effective only in the presence of large Doppler shifts. The amount of Doppler shift necessary to warrant the use of a non-uniform window depends on the amount of jamming noise power at the receiver, but is relatively insensitive to the frequency hop rate used.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jun 01, 1991
- Accession Number
- ADA245762
Entities
People
- Thomas W. Vece
Organizations
- Naval Postgraduate School