Pilot Scheme for a MIMO Communication System

摘要

The present invention employs a pilot scheme for frequency division multiple access (FDM) communication systems, such as single carrier FDM communication systems. A given transmit time interval will include numerous traffic symbols and two or more short pilot symbols, which are spaced apart from one another by at least one traffic symbol and will have a Fourier transform length that is less than the Fourier transform length of any given traffic symbol. Multiple transmitters will generate pilot information and modulate the pilot information onto sub-carriers of the short pilot symbols in an orthogonal manner. Each transmitter may use different sub-carriers within the time and frequency domain, which is encompassed by the short pilot symbols within the transmit time interval. Alternatively, each transmitter may uniquely encode the pilot information using a unique code division multiplexed code and modulate the encoded pilot information onto common sub-carriers of the short pilot symbols.

主权项

1. A method of transmitting sounding pilot information, the method comprising:
performing, by a mobile terminal:
generating the sounding pilot information for a transmitter; andmapping the sounding pilot information for the transmitter onto at least certain subcarriers of a first group of subcarriers within a transmission time interval (TTI);wherein the transmission time interval (TTI) comprises one or more pilot symbols and a plurality of traffic symbols;wherein the one or more pilot symbols comprises at least the first group of subcarriers and at least a second group of subcarriers, wherein the first group of subcarriers are sounding pilots, wherein the second group of subcarriers are pilots for demodulation, and wherein the second group does not comprise sounding pilots.