Configurable pilots in a wireless communication system

Abstract

Techniques for transmitting configurable pilots in a wireless communication system are described. The placement of pilots is determined based on an assignment of resources for transmission. Different placements of pilots are used for different assignments of resources. The assignment may be for one or more frames and/or one or more H-ARQ interlaces. The placement of pilot(s) in each frame or H-ARQ interlace may be determined based on the placement of pilot(s) in prior frame(s) or H-ARQ interlace(s). Pilots are sent at time and frequency locations determined by the placement of the pilots. Each pilot may be sent on one or more subcarriers in one or more symbol periods. The pilots may be TDM pilots and/or some other type of pilot. The pilots may be sent using IFDMA, LFDMA, EFDMA, OFDMA, or some other multiplexing scheme.

Description

Configurable pilots in wireless communication systems Related Application Cross Reference This application claims priority over the U.S. provisional application No. 60 / 710,426, assigned to the assignee of the present invention and incorporated herein by reference. technical field The present invention relates generally to communications, and more particularly to pilot transmission in wireless communication systems. Background technique In wireless communication systems, a transmitter typically processes (eg, encodes and symbol maps) traffic data to generate data symbols that are data modulation symbols. For a coherent system, a transmitter multiplexes pilots with data symbols, processes the multiplexed data symbols and pilots to produce a modulated signal, and transmits this signal over a wireless channel. The wireless channel distorts the transmitted signal due to channel response, and further degrades the signal due to noise and interference. A receiver receives t...

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Problems solved by technology

However, more pilots bring more overhea...

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