Patent Number: 7,103,092

Title: Channel estimation for time division duplex communication systems

Abstract: A single transmitter transmits K communication bursts in a shared spectrum in a time slot of a time division duplex communication system. Each burst has an associated midamble sequence, a receiver knowing the midamble sequences of the K bursts. The receiver receives a vector corresponding to the transmitted midamble sequences of the K communication bursts. A matrix having K right circulant matrix blocks is constructed based in part on the known K midamble sequences. The wireless channel between the transmitter and receiver is estimated based on in part the K block matrix and the received vector.

Inventors: Zeira; Ariela (Huntington, NY)

Assignee: InterDigital Technology Corp.

International Classification: H04B 1/69 (20060101); H04B 7/216 (20060101)

Expiration Date: 9/05/02018