Patent ID: 7016661
Filing Date: 2006-03-21
Classification: H04B,H04L

Abstract:
1. A method in a receiver for mitigating frequency offset between a transmitter and the receiver, the method comprising: providing a plurality of demodulators, the plurality of demodulators capable of demodulating a received signal at various levels of frequency offset, each demodulator having a different sensitivity versus frequency offset mitigation characteristic; estimating the frequency offset for the receiver; selecting a suitable demodulator, the selection being based on the estimated frequency offset; demodulating the received signal, the demodulation being carried out by the suitable demodulator; wherein estimating the frequency offset comprises calculating a frequency offset value from frequency stability information of the receiver and one or more transmitting devices, the transmitting devices being present in the operating environment of the receive; and wherein the calculation determines the worst-case frequency offset between the receiver and the transmitting devices based on their frequency stabilities.