Communication systems and methods

摘要

In accordance with embodiments, a communication system includes a first device and a second device in communication with the first device. The second device has at least a first pair and a second pair of antennas. The second device spreads a communication bit by a predetermined spreading factor and forms a first set of spatial block codes in frequency domain based on the spread communication bit. The first set of spatial block codes being consecutively transmitted on one of the first and second pairs of antennas.

主权项

1. A communication device comprising:
a first pair of antennas and a second pair of antennas; a transmitter coupled to the first pair and second pair of antennas, and comprising a control module, wherein the control module is configured to:
map a first vector of modulation symbols onto a first group of exactly three sets of space-frequency block codes according to a first spatial alternation assignment, wherein each set of space-frequency block codes of the first group includes two or more space-frequency block codes arranged in frequency, wherein the first vector of modulation symbols corresponds to a first control channel, wherein said mapping the first vector according to the first spatial alternation assignment includes mapping a first and last of the exactly three sets of the first group to the first pair of antennas, and a middle one of the exactly three sets of the first group to the second pair of antennas;map a second vector of modulation symbols onto a second group of exactly three sets of space-frequency block codes according to a second spatial alternation assignment, wherein each set of space-frequency block codes of the second group includes two or more space-frequency block codes arranged in frequency, wherein the second vector of modulation symbols corresponds to a second control channel, wherein said mapping the second vector according to the second spatial alternation assignment includes mapping a first and last of the exactly three sets of the second group to the second pair of antennas, and a middle one of the exactly three sets of the second group to the first pair of antennas; andtransmit the first group and the second group over a set of one or more OFDM symbols.