Multi-antenna diversity scheduling method and apparatus

摘要

The present invention provides a multi-antenna diversity scheduling method and apparatus. The method includes: transmitting pilot signals through x transmit antennas, where pilot signals on 1 to x−1 transmit antennas are a product of pilot symbols and a phase sequence, the phase sequence changes with at least one of time and frequency, the phase sequence changes more frequently than a user channel, and x is a positive integer greater than or equal to 2; receiving a transient channel quality information (CQI) value returned by a user according to the pilot signals; and according to the CQI value and a scheduling algorithm, scheduling the user to transmit data.

主权项

1. A multi-antenna diversity scheduling method, comprising:
transmitting pilot signals through x transmit antennas, wherein the pilot signals on 1 to x−1 transmit antennas are a product of pilot symbols and a phase sequence, wherein the phase sequence changes with at least one of: time and frequency, wherein the phase sequence changes more frequently than a user channel, and x is a positive integer greater than or equal to 2; receiving a transient channel quality information (CQI) value returned by a user according to the pilot signals; and according to the transient CQI value and a scheduling algorithm, scheduling the user to transmit data, wherein: the product of the pilot symbols and the phase sequence, comprising[exp⁡(j⁡(θn+2⁢π⁢⁢m⁢⁢τN))]⁢s⁡[m,n],wherein s[m,n] is a pilot symbol on subcarrier m at the nth orthogonal frequency division multiplexing (OFDM) pilot slot,exp⁡(j⁡(θn+2⁢π⁢⁢m⁢⁢τN))is a phase sequence, θn is a sequence that changes with time periodically within [−π,π], τ is a cyclic delay, and N is number of inverse fast Fourier transformation (IFFT) points;
if x−1 antennas transmit products of the pilot symbols and the phase sequence, a CQI value returned by the kth user is:C⁢⁢Q⁢⁢Ik=⁢Ptσ2⁢⁢1NRE⁢⁢∑m⁢∑n⁢hk(1)⁡[m,n]+ hk(2)⁡[m,n]⁢⁢exp⁢⁢{j(θn- 2⁢π⁢⁢m⁢⁢τN)}⁢⁢…+hk(a)⁡[m,n]⁢exp⁢{j⁡(θn′-2⁢π⁢⁢m⁢⁢τ′N)}2⁢, wherein hk(1)[m,n], hk(2)[m,n], . . . , hk(a)[m,n] are channel estimation values from x transmit antennas to receive antennas, NRE is number of resource blocks in a scheduling subband, Pt is power of a transmitted signal, σ2 is a variance, θ′n is a sequence that changes with time periodically within [−π,π], and τ′ is a cyclic delay.