Code division multiple access wireless system with time reversed space time block transmitter diversity

摘要

A wireless communication network ( 10 ) includes a wireless transmitter having a plurality of antennas (AT 1 ₁, AT 1 ₂). The transmitter includes for each of a plurality of different user channels (Dⁿ), circuitry ( 22 ⁿ) for providing a plurality of groups of symbols in a first symbol group sequence (D₁ⁿ). Each of the plurality of different user channels includes circuitry ( 24 ₁ⁿ) for forming a first modulated symbol group sequence for the user channel by modulating the symbols in the first symbol group sequence with a unique code that corresponds to the user channel and distinguishes the user channel from each other of the plurality of different user channels and circuitry ( 26 ₁) for combining the first modulated symbol group sequences for transmission by a first antenna (AT 1 ₁). Each of the plurality of different user channels includes circuitry ( 22 ⁿ) for forming a second symbol group sequence (D₂ⁿ) by time reversing symbols in at least some of the groups of symbols.