RADIO TRANSMISSION DEVICE, RADIO RECEPTION DEVICE, RADIO TRANSMISSION METHOD, AND RADIO RECEPTION METHOD
1 Assignment
0 Petitions
Accused Products
Abstract
It is possible to provide a radio reception device, a radio transmission device, a radio reception method, and a radio transmission method which can improve the channel estimation accuracy and the reception quality. The radio reception device (200) includes: reception units (203, 204) which receive a data sequence added by a reference signal for channel estimation of a spatial propagation path at a predetermined interval; demodulation units (205, 206) which demodulate the data sequence; a channel estimation unit (208) which estimates a propagation path fluctuation state according to the reference signal in the data sequence and outputs a channel estimation value obtained by interpolating or extrapolating the data sequence; and a decoding processing unit (210) which decodes the data sequence by using the interpolated or extrapolated channel estimation value.
-
Citations
46 Claims
-
1-22. -22. (canceled)
-
23. A radio receiving apparatus comprising:
-
a receiving section that receives a data sequence in which a reference signal for channel estimation in a spatial channel is provided at predetermined intervals; a channel estimating section that estimates a condition of channel variation based on the reference signal in the received data sequence, and outputs at least a channel estimation value acquired by extrapolation with respect to the data sequence based on the condition of variation; and a demodulation and decoding processing section that performs demodulation and decoding processing on the data sequence using the channel estimation value by the extrapolation. - View Dependent Claims (24, 25, 26, 27, 28, 29, 30, 31, 32, 33)
-
-
34. A radio transmitting apparatus using a transmission format in which a subframe comprises a plurality of orthogonal frequency division multiplexing symbols, the apparatus comprising:
-
a generating section that generates a reference signal for channel estimation of a spatial channel; an assigning section that assigns a data signal to a subcarrier in an orthogonal frequency division multiplexing symbol; a power adjusting section that adjusts transmission power of the reference signal such that the transmission power of the reference signal is greater than transmission power of the data signal; a reference signal multiplexing section that allocates the reference signal having the transmission power adjusted in the power transmission adjusting section at predetermined intervals in a frequency domain or a time domain of subcarriers in the orthogonal frequency division multiplexing symbol; and a transmitting section that performs an orthogonal frequency division multiplexing modulation with respect to the data signal and reference signal assigned to the subcarriers in the orthogonal frequency division multiplexing symbol and transmits an acquired orthogonal frequency division multiplexing modulation signal. - View Dependent Claims (35, 36, 37, 38, 39, 40, 41, 42, 45, 46)
-
-
43. A radio receiving method comprising the steps of:
-
receiving a data sequence in which a reference signal for channel estimation in a spatial channel is provided at predetermined intervals; demodulating the data sequence; estimating a condition of channel variation based on the reference signal in the received data sequence and outputting at least a channel estimation value acquired by extrapolation with respect to the data sequence based on the condition of variation; and performing demodulation and decoding processing on the data sequence using the channel estimation value by the extrapolation.
-
-
44. A radio transmitting method using a transmission format in which a subframe comprises a plurality of orthogonal frequency division multiplexing symbols, the method comprising the steps of:
-
generating a reference signal for channel estimation in a spatial channel; assigning a data signal to a subcarrier in an orthogonal frequency division multiplexing symbol; adjusting transmission power of the reference signal such that the transmission power of the reference signal is greater than transmission power of the data signal; allocating the reference signal of the transmission power adjusted in the power transmission adjusting step at predetermined intervals in a frequency domain or time domain of subcarriers in the orthogonal frequency division multiplexing symbol; and performing an orthogonal frequency division multiplexing modulation with respect to the data signal and reference signal assigned to the subcarriers in the orthogonal frequency division multiplexing symbol and transmitting the acquired orthogonal frequency division multiplexing modulation signal.
-
Specification