Radio transmitter, radio receiver and symbol arranging method
AssigneeMatsushita Electric Industrial Co., Ltd.
InventorsRyohei Kimura, Masayuki Hoshino, Tomohiro Imai, Kenichi Miyoshi, Yasuaki Yuda
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Abstract
A symbol arranging method by which a processing load due to channel estimation for MIMO channels can be reduced. In the methods a symbol is arranged for a transmission frame format having a pilot area and a data area. The pilot symbol is arranged in the pilot area. An ICE data symbol used for iterative channel estimation (ICE) is arranged in an ICE data area in the data area. The MIMO data symbol not used for ICE is arranged in the MIMO data area in the data area.
Claims16
A radio transmitting apparatus that transmits a transmission signal including a pilot signal period and a data signal period, comprising:
- a plurality of antennas;
- a generating section that generates the transmission signal by mapping a first data signal used in iterative channel estimation to a first period in the data signal period and a second data signal not used in iterative channel estimation to a second period in the data signal period;
- and
- a transmission section that transmits the transmission signal generated by the generating section from the plurality of antennas.
A radio receiving apparatus comprising:
- a plurality of antennas;
- a receiving section that receives by the plurality of antennas a received signal comprising a pilot signal period and a data signal period where a first data signal is mapped to a first period in the data period and a second data signal is mapped to a second period in the data period;
- and
- a channel estimating section that performs iterative channel estimation using only the first data signal, out of the first data signal and the second data signal.
A signal mapping method that maps a signal to a frame format having a pilot signal period and a data signal period, the method comprising the steps of:
- mapping a pilot signal to the pilot signal period;
- mapping a first data signal used in iterative channel estimation to a first period in the data signal period;
- and
- mapping a second signal not used in iterative channel estimation to a second period in the data signal period.
Dependencies are inferred from the claim text.