Patent ID: 8705575
Filing Date: 2014-04-22
Classification: H04L

Abstract:
1. A method that is performed by a transmitting device in a wireless communication system for transmitting multiple blocks of information bits simultaneously to a receiving device with hybrid automatic repeat request (HARQ) over a radio channel comprising at least two physical resources, said method comprising: coding at least two blocks of information bits separately to obtain one codeword per block of information bits; mapping each of the codewords to a corresponding set of modulation symbols; distributing each set of modulation symbols over the at least two physical resources, so that each physical resource carries a mixture of modulation symbols corresponding to the at least two blocks of information bits; transmitting the modulation symbols carried by each physical resource simultaneously to the receiving device; and receiving a compressed positive acknowledgement (ACK) or negative acknowledgement (NACK) message corresponding to the at least two blocks of information bits that were separately coded to obtain one codeword per block of information bits, wherein the distributing comprises pre-coded spatial multiplexing and said physical resources corresponds to layers, wherein during the distributing each set of modulation symbols over the at least two physical resources comprises using large delay Cyclic Delay Diversity (CDD), layer cycling, or HARQ to codeword cycling, wherein the layer cycling comprises shifting the modulation symbols of a codeword cyclically to a different physical resource from one transmission time to another transmission time, to approximately evenly distribute the modulation symbols of each codeword onto the different physical resources, wherein the large delay CDD includes transformation of the modulation symbols, and wherein the HARQ to codeword cycling includes cycling mapping of the HARQ to a codeword such that a single codeword will contain approximately equal proportion of information from all blocks of information bits.