Patent ID: 8699612
Filing Date: 2014-04-15
Classification: H04B,H04L

Abstract:
1. A receiver system, comprising: a first channel estimation block configured to perform a first channel estimation with regard to a first channel between a first transmit antenna and a first receive antenna and a second channel estimation with regard to a second channel between the first transmit antenna and a second receive antenna using a first scrambling code and a first common pilot channel pattern that are associated with the first transmit antenna; a second channel estimation block configured to perform a third channel estimation with regard to a third channel between a second transmit antenna and the first receive antenna and a fourth channel estimation with regard to a fourth channel between the second transmit antenna and the second receive antenna using a second scrambling code and a second common pilot channel pattern that are associated with the second transmit antenna; a closed-loop frequency offset compensator configured to compensate for a first frequency offset that is equal to a difference between a first carrier frequency associated with the first transmit antenna and a frequency synthesized by a local crystal oscillator; an open-loop frequency offset compensator configured to compensate for a second frequency offset that is equal to a difference between the first carrier frequency and a second carrier frequency associated with the second transmit antenna by adjusting at least one of a phase associated with the third channel estimation or a phase associated with the fourth channel estimation; and a timing compensator configured to compensate for a sampling timing difference between a first sampling timing that is associated with the first transmit antenna and a second sampling timing that is associated with the second transmit antenna; wherein at least the open-loop frequency offset compensator and the timing compensator are programmable to be selectively enabled or disabled based on a specified receiver operation mode, which is selected from a plurality of receiver operation modes, in accordance with which the receiver system is to operate.