A radio channel estimation method includes a combination of BER (bit error rate) estimation and RSSI (received signal strength indicator) estimation. The RSSI and the BER are detected from a received signal through a radio channel, and then the radio channel is estimated based on the RSSI and the BER....http://www.google.de/patents/US5870666?utm_source=gb-gplus-sharePatent US5870666 - Radio channel estimation based on BER and RSSI
