Signal Transmission Apparatus and Downlink Signal Transmission Method

摘要

Embodiments provide a signal transmission apparatus and a downlink signal transmission method. A downlink common channel signal that needs to be sent by using a wide beam is divided into multiple groups of grouped signals; for each group of grouped signals, signal weighting is separately performed on different radio frequency paths in a multi-antenna system; weighted grouped signals are combined to obtain a weighted downlink common channel signal; and the weighted downlink common channel signal is transmitted.

主权项

1. An apparatus, comprising:
a memory; a processor; and a transmission circuit; wherein the apparatus is configured to transmit a downlink signal, the downlink signal comprising a plurality of downlink common channel signals; wherein the transmission circuit comprises k parallel radio frequency paths, k represents a quantity of radio frequency paths, and k≧2; and wherein the memory is configured to store instructions enabling the processor to perform the following:
dividing a downlink common channel signal in the plurality of downlink common channel signals into N groups of grouped signals, wherein N represents a quantity of groups of grouped signals, and N≧2;performing, according to a weight vector that corresponds to each group of grouped signals in the grouped signals, signal weighting on the group of grouped signals to generate N first weighted signals, wherein the weight vector is used for adjusting amplitudes and phases of each group of grouped signals, so that the first weighted signals meet a wide-beam forming condition;combining the N first weighted signals that correspond to the N groups of grouped signals to obtain a second weighted signal; andtransmitting the second weighted signal.