Patent ID: 8503581
Filing Date: 2013-08-06
Classification: H04L

Abstract:
1. A method of identifying a transmission channel, the method comprising the steps of: assigning to each of P transmitters a set of orthogonal complementary sequences; operating the P transmitters during a first time period to transmit simultaneously through the transmission channel a first sequence of each of the sets of orthogonal complementary sequences; operating the P transmitters during a second time period following the first time period to transmit simultaneously through the transmission channel a second sequence of each of the sets of orthogonal complementary sequences; repeatedly operating the P transmitters during each of a number of subsequent time periods following the second time period to transmit simultaneously through the transmission channel P subsequent sequences during each subsequent time period until P sequences of Q sets of orthogonal complementary sequences are transmitted through the transmission channel; operating Q receivers during the time periods to receive the transmitted orthogonal complementary sequences; and identifying the transmission channel based on the received transmitted orthogonal complementary sequences, wherein each of P and Q is an integer, wherein P is greater than two and Q is greater than 2, wherein the step of identifying the transmission channel based on the received transmitted orthogonal complementary, sequences comprises the step of identifying parameters of a transference matrix hp,q in accordance with the following equation: wherein h