Abstract: The present invention is a fast fading packet diversity transmission method and system for reducing the effects of multipath fading on slow fading channels. One embodiment of the present invention includes a modulator for modulating information packets and a plurality of M multipliers for transmitting the modulated information packets from M antennas with up to M sets of M fixed phase offsets. Another embodiment of the present invention transmits a first group of information packets from M antennas with up to M sets of M fixed phase offsets and a second group of information packets with M slow time varying phase offsets.

Abstract: The present invention is an improved switched antenna diversity transmission system for use with an ARQ error protection protocol. The transmitter of the present invention includes an error detection encoder for encoding information packets with an error detection code, a modulator for modulating the encoded information packets, and a first antenna for transmitting the modulated information packets over a first forward channel of a wireless communication medium to the receiver. The transmitter further includes a switch for switching from the first antenna to a second antenna for transmitting the information packets over a second forward channel of a wireless communication medium in response to a negative acknowledgment from the receiver transmitted over a feedback channel of the wireless communication medium.