Wireless communication control channel systems and methods

摘要

Radio resources can be allocated in a manner avoiding a zero power problem by selecting one of two reference signals for control channel estimation, and transmitting the selected reference signal in a resource block (RB) or RB pair carrying the control channel. The two reference signals span common resource elements (REs) in the RB or RB pair. Alternatively, a zero power problem can be avoided by assigning modified WALSH codes to the two reference signals, and transmitting the two reference signals in the RB or RB pair carrying the control channel in accordance with their modified WALSH codes. The modified WALSH codes include complex constants having a non-zero phase difference with one another. A control channel can be evenly partitioned in accordance with a checkerboard partitioning technique.

主权项

1. A method for allocating resources in a wireless network, the method comprising:
transmitting a control channel in a resource block (RB) or RB-pair, the control channel comprising a first control channel element that is associated with a first antenna port and a second control channel element that is associated with a second antenna port, wherein the first antenna port is pre-assigned a first reference signal sequence and the second antenna port is pre-assigned a second reference signal sequence, and wherein the first reference signal sequence and the second reference signal sequence are mapped to common resource element (RE) locations in the RB or RB-pair; selecting the first reference signal sequence; and transmitting the first reference signal sequence in the RB or RB-pair without transmitting the second reference signal sequence in the RB or RB-pair, wherein the first reference signal sequence is configured to be used to perform channel estimation on both the first control channel element and the second control channel element at a receiver side.