Transmission-mode-aware rate matching in MIMO signal generation

摘要

A method in a Multiple-Input Multiple-Output (MIMO) transmitter includes selecting a transmission mode from a group of modes including a spatial multiplexing mode and a transmit diversity mode. A rate matching parameter is set depending on at least the selected transmission mode. Data for transmission is formatted in one or more transport blocks, each transport block including multiple code blocks having respective lengths, in symbols, that are respective integer multiples of the rate matching parameter. The code blocks of a given transport block are mapped onto time-frequency resource elements in accordance with the selected transmission mode, such that each resource element contains data originating from only a respective one of the code blocks of the given transport block. The code blocks of the given transport block are transmitted over the time-frequency resource elements to a receiver.

主权项

1. A method, comprising:
in a Multiple-Input Multiple-Output (MIMO) transmitter, selecting a transmission mode; setting a rate matching parameter for a given number of spatial layers to a first value when the selected transmission mode is a spatial multiplexing mode, and setting the rate matching parameter for the given number of the spatial layers to a second value, different from the first value, when the selected transmission mode is a transmit diversity mode; formatting data for transmission in one or more transport blocks, each transport block comprising multiple code blocks having respective lengths, in symbols, that are respective integer multiples of the rate matching parameter; mapping the code blocks of a given transport block onto the given number of the spatial layers and onto time-frequency resource elements in accordance with the selected transmission mode, each resource element corresponding to a respective frequency range that is allocated for a given transmission over a specified time interval, such that each resource element contains data originating from only a respective one of the code blocks of the given transport block; and transmitting the code blocks of the given transport block in a MIMO signal over the time-frequency resource elements to a receiver.