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AssigneeMatsushita Electric Industrial Co., Ltd.
InventorsKiyotaka Kobayashi, Yutaka Murakami, Masayuki Orihashi
Estimating the term…
A radio transmitting apparatus that has a plurality of antennas and changes the number of modulated signals transmitted simultaneously according to the propagation environment and so forth. A transmission power changing section 12 of a radio transmitting apparatus of the present invention adjusts the pilot symbol signal level so as to match the data symbol composite signal level according to the number of transmit modulated signals set by a modulated signal number setting section 11. By this means, the operating range of received pilot symbols and the operating range of received data symbols become approximately the same on the receiving side, enabling pilot symbol quantization error to be reduced. As a result, the precision of radio wave propagation environment estimation, time synchronization, and frequency offset estimation using pilot symbols improves, and consequently data reception quality improves.
1-12. (canceled)
A radio transmission method for transmitting data symbols using at least one antenna, the method comprising:
A radio transmission method for transmitting data symbols, a first preamble and a second preamble using a first antenna and a second antenna, the method comprising:
Dependencies are inferred from the claim text.