Patent ID: 7711034
Filing Date: 2010-05-04
Classification: H04B

Abstract:
1. A wireless communication system, comprising: a user station comprising: despreading circuitry for receiving and despreading a plurality of slots received from at least a first transmit antenna and a second transmit antenna at a transmitting station, wherein each of the plurality of slots comprises a first channel comprising a first set of pilot symbols and a second channel comprising a second set of pilot symbols; circuitry for measuring a first channel measurement for each given slot in the plurality of slots from the first transmit antenna and in response to the first set of pilot symbols in the given slot; circuitry for measuring a second channel measurement for each given slot in the plurality of slots from the second transmit antenna and in response to the second set of pilot symbols in the given slot; and circuitry for measuring a phase difference value for each given slot in the plurality of slots in response to the first channel measurement and the second channel measurement for the given slot and in response to a ninety degree rotation of the given slot relative to a slot which was received by the despreading circuitry immediately preceding the given slot.