Pulse or digital communications – Receivers – Interference or noise reduction
Patent
1993-12-29
1995-12-26
Chin, Stephen
Pulse or digital communications
Receivers
Interference or noise reduction
375349, H04B 110, H04L 2508
Patent
active
054794536
ABSTRACT:
A digital receiver for receiving an RF signal has a conventional RF to intermediate frequency (IF) converter. The IF signal, however, is amplified with a limit on its amplitude. In addition, a Receive Signal Strength Intensity (RSSI) signal is generated. The RSSI signal contains the envelope information of the modulated IF signal. The IF amplitude limited signal containing phase information, is then digitized and a complex baseband signal is produced. The complex baseband signal is then combined with the RSSI signal to restore the amplitude information of the modulated IF signal in the complex baseband signal. The restored complex baseband signal can be equalized with a conventional equalizer to remove intersymbol interference. A conventional symbol detector detects the symbol in this signal stream.
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patent: 5214390 (1993-05-01), Montreuil
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A. Higashi et al., NTT Radio Communication Systems Lab., "BER Performance of Mobile Equalizer Using RLS Algorithm in Selective Fading Environment".
S. Sampei, "Development of Japanese Adaptive Equalizing Technology Toward High Bit Rate Data Transmission in Land Mobile Communications", IEICE Transactions, vol. E 74, No. 6, Jun. 1991.
Y. Liu, "Bi-Directional Equalization Technique for TDMA Communication Systems over Land Mobile Radio Channels", pp. 1458-1462, Globecom '91.
Anvari Kiomars
Bahai Ahmad S.
Behtash Saman
Winship Peter
Chin Stephen
TSCI Corporation
Vo Don N.
Yin Ronald L.
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