Patent ID: 7978780
Filing Date: 2011-07-12
Classification: H04B,H04L

Abstract:
1. A method comprising: receiving a speed-determinative signal at a mobile device; determining a first speed at which the mobile device is traveling based at least in part on said speed-determinative signal; determining, by the mobile device, a first cyclic delay to be used to provide cyclic delay diversity (CDD) to wireless transmissions between a wireless communication device and the mobile device, said determining the first cyclic delay including accessing a lookup table for the first cyclic delay based at least in part on the first speed; transmitting, by the mobile device, the first cyclic delay to the wireless communication device; determining a second speed at which the mobile device is traveling; determining a second cyclic delay to be used in the wireless transmissions between the wireless communication device and mobile device based at least in part on the second speed; determining that the second cyclic delay varies from the first cyclic delay; and transmitting the second cyclic delay based at least in part on said determining that the second cyclic delay varies from the first cyclic delay.