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US 10,567,208 B2Granted
Communication device and method in filter-bank based single carrier frequency division multiple access system
AssigneeSamsung Electronics Co., Ltd.
InventorsKyeongyeon Kim, Yeohun Yun, Chanhong Kim, Jiyun Seol, Byunghwan Lee, Ming Hoka
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Abstract
Disclosed is a 5G or pre-5G communication system to be provided for supporting a data transmission rate higher than that of a 4G communication system such as LTE. Particularly, the present invention relates to a communication device and method in a filter-bank based single carrier frequency division multiple access (FB based SC-FDMA) system and, particularly, to a communication device and method for lowering a peak to average power ratio (PAPR) in an uplink.
Claims20
A transmission device operating in a filter bank mode multiple access radio communication, the transmission device comprising:
- a plurality of analysis filter banks, each analysis filter bank configured to perform a respective reverse operation of a corresponding synthesis filter bank that is selected for transmitting modulation symbols mapped to time resources;
- and
- at least one processor configured to:
- modulate data into the modulation symbols;
- map the modulation symbols to the time resources on a time axis at a predetermined interval according to an overlapping factor and a number of the modulation symbols to transmit;
- map the modulation symbols filtered by a selected one of the plurality of the analysis filter banks to pre-allocated frequency resources, wherein the selected one of the analysis filter banks minimizes a self signal to interference ratio (SIR) and a peak to average power ratio (PAPR) among the plurality of analysis filter banks;
- select at least one synthesis filter bank of the plurality of the synthesis filter banks, the selected at least one synthesis filter bank configured to synthesize the modulation symbols mapped to the frequency resources to recover a time domain signal;
- and
- overlap and sum outputs of the selected at least one synthesis filter bank with the overlapping factor.
6 more elements
A method for operating a transmission device in a filter bank mode multiple access radio communication system, the method comprising:
- modulating data to transmit into modulation symbols;
- mapping the modulation symbols to time resources on a time axis at a predetermined interval according to an overlapping factor and a number of the modulation symbols to transmit;
- selecting one analysis filter bank that minimizes a self signal to interference ratio (SIR) and a peak to average power ratio (PAPR) among a plurality of analysis filter banks, each analysis filter bank configured to perform a respective reverse operation of a corresponding synthesis filter bank that is selected to synthesize the modulation symbols mapped to the time resources;
- performing, by using the selected one analysis bank, a reverse operation of the synthesis filter bank that is selected to synthesize the modulation symbols mapped to the time resources;
- mapping the modulation symbols that are filtered by the selected one analysis filter bank to pre-allocated frequency resources;
- synthesizing, using the selected synthesis filter bank, the filtered symbols mapped to the frequency resources to recover a time domain signal;
- overlapping outputs of the selected synthesis filter bank with the overlapping factor;
- and
- summing the overlapped outputs of the selected synthesis filter bank for transmission.
6 more elements
A method for operating a transmission device of a filter bank mode multiple access radio communication system, the method comprising:
- receiving scheduling information for transmitting data in response to a scheduling request transmitted to a base station;
- acquiring information on a selection on one of synthesis filter banks and allocated resources based on the scheduling information;
- selecting one analysis filter bank that minimizes a self signal to interference ratio (SIR) and a peak to average power ratio (PAPR) among a plurality of analysis filter banks that perform reverse operations of correspondingly selected synthesis filter banks;
- mapping modulation symbols to time resources on a time axis at a predetermined interval according to an overlapping factor and a number of the modulation symbols;
- performing a reverse operation of the selected synthesis filter bank on the modulation symbols mapped to the time resources using the selected analysis filter bank;
- mapping outputs of the selected analysis filter bank to predetermined frequency resources;
- recovering, at the selected synthesis filter bank, time domain signals by synthesizing symbols mapped to the frequency resources;
- and
- overlapping and summing outputs of the selected synthesis filter bank with the overlapping factor for transmission.
6 more elements
A device for transmitting data in a filter bank mode multiple access radio communication system, wherein the device comprises:
- a plurality of analysis filter banks, each analysis filter bank configured to perform a respective reverse operation of a corresponding synthesis filter bank that is selected for transmitting modulation symbols mapped to time resources;
- at least one processor configured to:
- encode the data to be transmitted at a controlled coding rate;
- modulate the encoded data into modulation symbols;
- and
- select, among the plurality of analysis filter banks, an analysis filter bank that minimizes a signal to interference ratio (SIR) and a peak to average power ratio (PAPR) of the symbols for transmission;
- wherein the at least one processor is further configured to:
- map the modulation symbols to the time resources on a time axis at a predetermined interval according to an overlapping factor and a number of the modulation symbols to be transmitted;
- map the modulated symbols, mapped to the time resources and filtered by one of the plurality of analysis filter banks, to pre-allocated frequency resources;
- select at least one synthesis filter bank of the plurality of the synthesis filter banks, the selected at least one synthesis filter bank configured to recover time domain signals by synthesizing the symbols mapped to the frequency resources;
- and
- overlap and sum outputs of the selected at least one synthesis filter bank for transmission.
9 more elements
Dependencies are inferred from the claim text.