Wireless communication system, a method of allocating pilot signals (Options) and PILOT MODEL (OPTIONS)

摘要

1. A method for allocating pilots for transmission of multiple pilot streams in a system with many antenna input multiple-output (MIMO), using orthogonal frequency division multiplexing (OFDM), comprising: providing two contiguous frame structures, each frame structure comprises OFDM symbols in time domain and subcarriers in frequency domain; ! placing two pilots for each pilot stream in a plurality of the first frame structure; and! placing two pilot signals for each of a plurality of pilot streams in second frame structure based on the pilot allocation in first frame structure. ! 2. The method of claim 1, wherein the number of subcarriers is 18.! 3. The method of claim 1, wherein the number of OFDM symbols is 5, 6 or 7! 4. The method of claim 1, wherein the step of placing two pilots in the first frame structure further comprises the following steps: grouping the plurality of pilot streams into two pilot stream clusters; ! grouping the two pilots for each of the two pilot stream clusters into two pilot clusters; and! placing the two pilot clusters for first pilot stream cluster and a second pilot stream cluster according to a predefined pattern of reserved portions for placing pilot signals. ! 5. The method of claim 4, wherein the step of placing the two pilot clusters further comprising the steps of: placing the first pilot cluster for first pilot stream cluster in first portion of subcarriers on first portion of OFDM symbols, and second pilot cluster for first pilot stream cluster at second portion of subcarriers on second