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Average-tap energy based thresholding for channel estimation in multi antenna systems

  • US 8,107,517 B2
  • Filed: 11/16/2006
  • Issued: 01/31/2012
  • Est. Priority Date: 12/09/2005
  • Status: Active Grant
First Claim
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1. A method of performing channel estimation in a multi-channel OFDM wireless communication system, to more efficiently estimate a channel impulse response when the signal to noise interference ratio is very low and the noise only taps have more energy than actual channel taps comprising:

  • receiving a communication signal over a plurality of wireless communication channels;

    measuring energy of the communication signal at a plurality of channel taps in a receiver;

    determining a signal energy value at a given channel tap position as a function of the measured energy at the plurality of channel taps by averaging measured signal energy at channel taps with the same position as the given channel tap position across at least two receive antennas; and

    selecting a subset of channel taps in the receiver based on the signal energy value;

    wherein selecting comprises selecting when the signal energy value is above a threshold.

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