Pilot pattern design for a STTD scheme in an OFDM system

摘要

A transmitting device for transmitting data symbols and pilot symbols in an OFDM transmission system; the device comprising symbol generating means for generating said data symbols and said pilot symbols, means for transmitting said data symbols and pilot symbols respectively by using a plurality of subcarriers of said OFDM transmission system, wherein said symbol generating means is designed to selectively generate a first type pilot symbol and a second type pilot symbol being orthogonal to said first type pilot symbol so that a pilot symbol pattern in the frequency dimension comprises at least said first type pilot symbol to be transmitted by using a predefined subcarrier and second type pilot symbol to be transmitted by using other predefined subcarrier, and wherein said pilot symbol pattern has a different pattern from a succeeding pilot symbol pattern in time dimension.

主权项

1. A transmitter that transmits data symbols in an orthogonal frequency division multiplex (OFDM) system, the transmitter comprising:
circuitry configured to control transmission of:
a first pair of symbols for channel estimation via a first subcarrier from a first source, the first pair of symbols based on a first pattern;a second pair of symbols for channel estimation via the first subcarrier from a second source spatially different from the first source, the second pair of symbols based on a second pattern and being orthogonal to the first pair of symbols;a first data symbol from one of the first source and the second source; anda second data symbol from another of the first source and the second source.