WIRELESS COMMUNICATION TERMINAL APPARATUS, WIRELESS COMMUNICATION BASE STATION APPARATUS, AND CLUSTER CONSTELLATION SETTING METHOD

• US 20110222500A1
• Filed: 11/13/2009
• Published: 09/15/2011
• Est. Priority Date: 11/14/2008
• Status: Active Grant

• Current Assignee: Sun Patent Trust
• Original Assignee: Panasonic Intellectual Property Corporation of America (Panasonic Holdings Corporation)
• Inventors: Nakao, Seigo, Imamura, Daichi, Takaoka, Shinsuke, Hoshino, Masayuki
• Granted Patent: US 8,687,575 B2
• Time in Patent Office: Days
• US Class Current: 370/329
• CPC Class Codes: H04B 7/0456 Selection of precoding matrices or codebooks, e.g. using matrices antenna weighting
• CPC Class Codes: H04J 13/0059 CAZAC [constant-amplitude and zero auto-correlation]
• CPC Class Codes: H04L 1/0003 by switching between different modulation schemes
• CPC Class Codes: H04L 1/0009 by adapting the channel coding H04L1/1812 takes precedence
• CPC Class Codes: H04L 27/0008 arrangements for allowing a transmitter or receiver to use more than one type of modulation negotiating modulation type for two-way transmission paths H04L5/1453
• CPC Class Codes: H04L 27/2636 with FFT or DFT modulators, e.g. standard single-carrier frequency-division multiple access [SC-FDMA] transmitter or DFT spread orthogonal frequency division multiplexing [DFT-SOFDM]
• CPC Class Codes: H04L 5/0007 the frequencies being orthogonal, e.g. OFDM(A), DMT
• CPC Class Codes: H04L 5/0021 in which codes are applied as a frequency-domain sequences, e.g. MC-CDMA
• CPC Class Codes: H04L 5/0023 Time-frequency-space
• CPC Class Codes: H04L 5/0041 Frequency-non-contiguous
• CPC Class Codes: H04L 5/0046 Determination of how many bits are transmitted on different sub-channels
• CPC Class Codes: H04L 5/006 Quality of the received signal, e.g. BER, SNR, water filling
• CPC Class Codes: H04W 72/0453 Resources in frequency domain, e.g. a carrier in FDMA
• CPC Class Codes: Y02D 30/50 in wire-line communication networks, e.g. low power modes or reduced link rate

Abstract

A wireless communication terminal apparatus wherein even when a SC-FDMA signal is divided into a plurality of clusters and the plurality of clusters are then mapped to respective discontinuous frequency bands (when C-SC-FDMA is used), the improvement effect of system throughput can be maintained, while the user throughput can be improved. In the apparatus, a DFT unit (210) subjects a symbol sequence of time domain to a DFT process, thereby generating signals of frequency domain. A setting unit (211) divides the signals input from the DFT unit (210) into a plurality of clusters according to a cluster pattern that is in accordance with an MCS set, an encoding size, or the number of Ranks occurring during MIMO transmissions, which is indicated in those signals input, and then maps the plurality of clusters to the respective ones of a plurality of discontinuous frequency resources, thereby setting a constellation of the plurality of clusters in the frequency domain.

Claims

1-20. -20. (canceled)

21. A radio communication terminal apparatus comprising:

a transformation section that applies discrete Fourier transform processing to a time domain symbol sequence, to generate a frequency domain signal; and

a setting section that divides the frequency domain signal into a plurality of clusters in accordance with a cluster pattern corresponding to a modulation and coding scheme (MCS) set that is set for the frequency domain signal, a coding size that is set for the frequency domain signal or a rank index in a multi-input multi-output (MIMO) transmission, maps the plurality of clusters to a plurality of discontinuous frequency resources, and thereby determines an arrangement of the plurality of clusters in a frequency domain.

22. The radio communication terminal apparatus according to claim 21, wherein the setting section divides the frequency domain signal in accordance with the cluster pattern with a smaller number of clusters for a higher modulation level set in the MCS set.

23. The radio communication terminal apparatus according to claim 21, wherein the setting section divides the frequency domain signal in accordance with the cluster pattern with a wider bandwidth for each of the plurality of clusters for a higher modulation level indicated in the MCS set.

24. The radio communication terminal apparatus according to claim 21, wherein the setting section maps the plurality of clusters to a plurality of discontinuous frequency resources according to the cluster pattern with a narrower frequency interval between the plurality of clusters for a higher modulation level indicated in the MCS set.

25. The radio communication terminal apparatus according to claim 21, wherein the setting section divides the frequency domain signal according to the cluster pattern having a smaller number of clusters for the smaller coding size.

26. The radio communication terminal apparatus according to claim 21, wherein the setting section divides the frequency domain signal according to the cluster pattern having a wider bandwidth per cluster for the smaller coding size.

27. The radio communication terminal apparatus according to claim 21, wherein the setting section maps the plurality of clusters to a plurality of discontinuous frequency resources according to the cluster pattern with a narrower frequency interval between the plurality of clusters for the smaller coding size.

28. The radio communication terminal apparatus according to claim 21, wherein the setting section divides the frequency domain signal according to the cluster pattern having a smaller number of clusters for a higher coding rate indicated in the MCS set.

29. The radio communication terminal apparatus according to claim 21, wherein the setting section divides the frequency domain signal according to the cluster pattern with a wider bandwidth per cluster for a higher coding rate indicated in the MCS set.

30. The radio communication terminal apparatus according to claim 21, wherein the setting section maps the plurality of clusters to a plurality of discontinuous frequency resources in accordance with the cluster pattern with a narrower frequency interval between the plurality of clusters for a higher coding rate indicated in the MCS set.

31. The radio communication terminal apparatus according to claim 21, wherein the setting section divides the frequency domain signal according to the cluster pattern with a smaller number of clusters for the higher rank index.

32. The radio communication terminal apparatus according to claim 21, wherein the setting section divides the frequency domain signal in accordance with the cluster pattern with a wider bandwidth for each of the plurality of clusters for the higher rank index.

33. The radio communication terminal apparatus according to claim 21, wherein the setting section maps the plurality of clusters to a plurality of discontinuous frequency resources in accordance with the cluster pattern having a narrower frequency interval between the plurality of clusters for the higher rank index.

34. The radio communication terminal apparatus according to claim 21, wherein the setting section uses the same cluster pattern for the plurality of frequency domain signals mapped to different layers during the MIMO transmission.

35. The radio communication terminal apparatus according to claim 21, wherein the setting section uses the same cluster pattern for the same frequency domain signal mapped to different layers during the multi-input multi-output transmission.

36. The radio communication terminal apparatus according to claim 21, wherein the setting section reduces the number of clusters for a frequency domain signal having the higher MCS set of the signals mapped to different layers during the MIMO transmission.

37. The radio communication terminal apparatus according to claim 21, wherein the setting section widens the bandwidth per cluster for a frequency domain signal having the higher MCS set of the signals mapped to different layers during the MIMO transmission.

38. The radio communication terminal apparatus according to claim 21, wherein the setting section narrows the frequency interval between the plurality of clusters for a frequency domain signal having the higher MCS set of the signals mapped to different layers during the MIMO transmission.

39. A radio communication base station apparatus comprising:

a determining section that determines a cluster pattern of a signal according to a MCS set that is set for the signal from a radio communication terminal apparatus, a coding size that is set for the signal or a rank index in a multi-input multi-output transmission; and

a reporting section that reports the determined cluster pattern to the radio communication terminal apparatus.

40. A cluster arrangement setting method comprising:

dividing a frequency domain signal generated by applying discrete Fourier transform processing to a time domain symbol sequence into a plurality of clusters in accordance with a cluster pattern corresponding to a modulation and coding scheme set that is set for the frequency domain signal, a coding size that is set for the frequency domain signal or a rank index in a multi-input multi-output transmission; and

mapping the plurality of clusters to a plurality of discontinuous frequency resources and thereby setting an arrangement of the plurality of clusters.

41. A cluster pattern reporting method for reporting a cluster pattern of a signal from a radio communication terminal apparatus determined in accordance with a modulation and coding scheme set that is set for the signal, a coding size that is set for the signal or a rank index in a multi-input multi-output transmission to the radio communication terminal apparatus.