Patent ID: 9025688
Filing Date: 2015-05-05
Classification: H04B,H04L,H04W

Abstract:
1. A method for multiple input multiple output (MIMO) transmission in a wireless communication system, the method performed by a transmitter and comprising: encoding a first control signal by using a first convolutional coding to generate an encoded first control signal, the first control signal including common control information that is common to all receivers; encoding a second control signal by using a second convolutional coding to generate encoded second control signal, the second control signal including user-specific MIMO information; transmitting the encoded first control signal to at least one receiver over two first orthogonal frequency division multiplexing (OFDM) symbols; transmitting the encoded second control signal to the at least one receiver via at least one spatial stream over one second OFDM symbol that is subsequent to the two first OFDM symbols; and transmitting at least one data packet to the at least one receiver, wherein the common control information includes a resource assignment, MIMO information and position information, the resource assignment indicating a frequency band in which the encoded second control signal is to be transmitted, the MIMO information of the common control information indicating whether the encoded second control signal is to be transmitted by a single-user MIMO scheme or by using a multi-user MIMO scheme, the position information indicating the at least one spatial stream through which the encoded second control signal is to be transmitted, wherein the user-specific MIMO information includes information that is used to decode the at least one data packet by the at least one receiver, wherein the encoding the second control signal further includes, after using the second convolutional coding, precoding the second control signal with a matrix that is specific to a corresponding one of the at least one receiver, and wherein the encoding the first control signal does not include precoding with any matrix that is specific to any receiver of the at least one receiver.