Patent ID: 8085864
Filing Date: 2011-12-27
Classification: H04B,H04L

Abstract:
1. A method of communicating with mobile terminal from a network element of a mobile radio network, the network element and the mobile terminal each including a first antenna and a second antenna, the method comprising: receiving an indication for a MIMO downlink channel for communicating with the mobile terminal; selecting at least one first training sequence from a set of training sequences for allocation to the first antenna of the network element; preparing at least one data payload; generating a first signal including the prepared at least one data payload and the at least one training sequence; transmitting the first signal as a MIMO transmission forming the downlink channel from the first antenna of the network element to the mobile terminal; and in response to the indication for the MIMO downlink channel for communicating with the mobile terminal, selecting at least one second training sequence from the set of training sequences for allocation to the second antenna of the network element, wherein each of the selected training sequences of the at least one second training sequence is different from each of the selected training sequences of the at least one first training sequence; preparing at least one second data payload; generating a second signal including the prepared at least one second data payload and the at least one second training sequence; transmitting to the mobile terminal the second signal in the downlink MIMO channel from the second antenna of the network element simultaneously with the transmission of the first signal to form the MIMO transmission; and for corresponding MIMO transmissions in a same position in subsequent frames to that of the MIMO transmission using each of the at least one first training sequence only for transmissions from the first antenna of the network element, and using each of the at least one second training sequence only for transmissions from the second antenna of the network element.