An Adaptive Switching Echo Cancellation/Diversity Reception for an FM Broadcasting Receiver in Multipath Mobile Channel

Fangwei TONG  Takuya OTANI  Yoshihiko AKAIWA  

IEICE TRANSACTIONS on Communications   Vol.E81-B   No.3   pp.637-646
Publication Date: 1998/03/25
Online ISSN: 
Print ISSN: 0916-8516
Type of Manuscript: PAPER
Category: Radio Communication
diversity,  adaptive array,  echo cancellation,  FM broadcast,  FM receiver,  mobile communications,  

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In the multipath mobile channel, the received signal suffers from both the fluctuation in the received field intensity caused by fading and waveform distortion caused by the echo. Diversity reception using multiple spaced antennas is an effective method to compensate for fading, while echo cancellation with an adaptive array is good at compensating for waveform distortion. In this paper, an adaptive switching echo cancellation/diversity reception method to compensate for both waveform distortion and fading is proposed. The proposed switching reception monitors the impacts of channel conditions on received signal and then one of an echo canceller and a diversity receiver is selected accordingly to compensate the channel. The compensation performance of the proposed switching reception in terms of both average DUR (Desired to Undesired signal Ratio) and the probability of DUR below a threshold value is investigated with computer simulation. The results show that the adaptive switching echo cancellation/diversity reception has realized the advantages of both adaptive echo cancellation and diversity reception.