Blind Spectrum Sensing in Cognitive Radio over Fading Channels and Frequency Offsets

Details Blind Spectrum Sensing in Cognitive Radio over Fading Channels and Frequency Offsets Blind Spectrum Sensing in Cognitive Radio over Fading Channels and Frequency Offsets

2010-06-16

arxiv.org/abs/1006.3155v3

Computer Science

Information Theory

14 pages, 7 figures

Scientific paper

This paper deals with the challenging problem of spectrum sensing in cognitive radio. We consider a stochastic system model where the the Primary User (PU) transmits a periodic signal over fading channels. The effect of frequency offsets due to oscillator mismatch, and Doppler offset is studied. We show that for this case the Likelihood Ratio Test (LRT) cannot be evaluated poitnwise. We present a novel approach to approximate the marginilisation of the frequency offset using a single point estimate. This is obtained via a low complexity Constrained Adaptive Notch Filter (CANF) to estimate the frequency offset. Performance is evaluated via numerical simulations and it is shown that the proposed spectrum sensing scheme can achieve the same performance as the near-optimal scheme, that is based on a bank of matched filters, using only a fraction of the complexity required.

Affiliated with

Also associated with

No associations

Rating

Blind Spectrum Sensing in Cognitive Radio over Fading Channels and Frequency Offsets does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Blind Spectrum Sensing in Cognitive Radio over Fading Channels and Frequency Offsets, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Blind Spectrum Sensing in Cognitive Radio over Fading Channels and Frequency Offsets will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-100187