Patent Document ID: 8737501
Application ID: 12333234
Patent Status: 1

Claim One:
1. A method of estimating a covariance matrix in a communication system, the method comprising: i) obtaining a plurality of waveforms, the plurality of waveforms associated with a reception time; ii) determining whether a packet is detected during the reception time; iii) determining whether an automatic gain control setting changes during the reception time; iv) estimating a covariance matrix based on the plurality of waveforms; and v) determining a spatial filter based on the estimated covariance matrix after it is determined that a packet is not detected during the reception time and after it is determined that an automatic gain control setting has not changed during the reception time, wherein said determining a spatial filter based on the estimated covariance matrix is performed after operations ii) and iii), wherein when it is so determined that a packet is detected during the reception time or an automatic gain control setting changes during the reception time, at least operations i)-iii) are repeated.