Packet transmission method and apparatus for use in filter bank-based multi-carrier wireless communication

• US 9,912,515 B2
• Filed: 01/18/2016
• Issued: 03/06/2018
• Est. Priority Date: 01/16/2015
• Status: Active Grant

• Current Assignee: Industry Academic Cooperation Foundation, Samsung Electronics Co. Ltd.
• Original Assignee: Industry Academic Cooperation Foundation, Samsung Electronics Co. Ltd.
• Inventors: Yun, Yeohun, Choi, Sooyong, Nam, Hyungju, Chung, Wonsuk, Choi, Moonchang, Han, Seongbae, Hong, Daesik
• Primary Examiner(s): Fan, Chieh M
• Assistant Examiner(s): MCKIE, GINA M
• Application Number:
  US14/997,867
• Publication Number:
  US 20160212004A1
• Time in Patent Office: 778 Days
• Field of Search: None
• CPC Class Codes: H04L 27/2627 Modulators
• CPC Class Codes: H04L 27/2698 double density OFDM/OQAM system, e.g. OFDM/OQAM-IOTA system
• CPC Class Codes: H04L 27/3405 Modifications of the signal space to increase the efficiency of transmission, e.g. reduction of the bit error rate, bandwidth, or average power

Abstract

The present disclosure relates to a pre-5th-Generation (5G) or 5G communication system to be provided for supporting higher data rates Beyond 4th-Generation (4G) communication system such as Long Term Evolution (LTE).

A packet transmission method and apparatus for use in a wireless communication system and, in particular, for transmitting packets in a filter bank-based multicarrier wireless communication system. The packet transmission method for use in a wireless communication system based on Filter Bank-based Multi-Carrier (FBMC) includes generating an Offset Quadrature Amplitude Modulation (OQAM) symbol by extracting a transmission data period from data blocks obtained by repeating a transmission data as many times as an overlapping factor, performing Inverse Fast Fourier Transform (IFFT) on the OQAM symbol, shifting, when the overlapping factor is an even number, the IFFT-ed symbol cyclically, filtering the cyclically shifted symbol with a shortened compensation filter, and transmitting the filtered symbol in an overlapped OQAM signal.

Claims

1. A packet transmission method for use in a wireless communication system based on filter bank-based multi-carrier (FBMC), the method comprising:

generating an offset quadrature amplitude modulation (OQAM) symbol by extracting a transmission data period from data blocks obtained by repeating a transmission data equal to an overlapping factor;

performing inverse fast fourier transform (IFFT) on the OQAM symbol;

shifting, if the overlapping factor is an even number, the IFFT-ed symbol cyclically;

filtering the cyclically shifted symbol with a shortened compensation filter; and

transmitting the filtered cyclically shifted symbol in an overlapped OQAM signal.

2. The method of claim 1, further comprising:

filtering, if the overlapping factor is an odd number, the IFFT-ed symbol with the shortened compensation filter; and

transmitting the filtered IFFT-ed symbol in the overlapped OQAM signal.

3. The method of claim 1, wherein the transmission data is a short burst data.

4. The method of claim 1, wherein extracting the transmission data period comprises extracting data between points distant as long as half of one data length backward and forward from a maximum energy point of a prototype filter used in the FBMC-based wireless communication system among the data blocks obtained by repeating the transmission data.

5. The method of claim 1, wherein shifting the IFFT-ed symbol cyclically comprises interchanging a position of a first half of the IFFT-ed symbol and a last half of the IFFT-ed symbol.

6. A packet transmission apparatus for use in a wireless communication system based on filter bank-based multi-carrier (FBMC), the apparatus comprising:

a symbol generator configured to extract a transmission data period from data blocks obtained by repeating a transmission data equal to an overlapping factor and output an offset quadrature amplitude modulation (OQAM) symbol using the extracted transmission data period;

an inverse fast fourier transform (IFFT) processor configured to perform IFFT on the OQAM symbol;

a filter configured to filter the IFFT-ed symbol with a shortened compensation filter, and overlap the filtered symbol in an overlapped OQAM signal; and

a controller configured to control a switch based on a size of the transmission data and the overlapping factor; and

the switch configured to switch an output of the IFFT-ed symbol from the IFFT processor to perform a cycle shift using a cyclic shift processor or filter the IFFT-ed symbol using the controller.

7. The apparatus of claim 6, wherein the controller is configured to control, if the overlapping factor is an odd number, the switching to the IFFT-ed symbol to a shortened compensation filter.

8. The apparatus of claim 6, wherein the transmission data is a short burst data.

9. The apparatus of claim 6, wherein the controller is configured to control the symbol generator to extract data between points distant as far as half of one data length backward and forward from a maximum energy point of a prototype filter used in the FBMC-based wireless communication system among the data blocks obtained by repeating the transmission data.

10. The apparatus of claim 6, wherein the controller is configured to control the cyclic shift processor to interchange a position of a first half of the IFFT-ed symbol and a last half of the IFFT-ed symbol.

11. A packet reception method for use in a wireless communication system based on filter bank-based multi-carrier (FBMC), the method comprising:

outputting a baseband signal by processing a symbol with an FBMC length;

filtering the baseband signal with a prototype filter used in the wireless communication system to provide filtered data;

shifting, if an overlapping factor of the wireless communication system is an even number, the filtered data cyclically;

performing M-point fast fourier transform (FFT) on the cyclically shifted data;

equalizing the FFT-ed cyclically shifted data; and

demodulating the equalized data.

12. The method of claim 11, further comprising:

performing, if the overlapping factor of the wireless communication system is an odd number, the M-point FFT on the filtered data;

equalizing the FFT-ed filtered data; and

demodulating the equalized FFT-ed filtered data.

13. The method of claim 11, wherein equalizing the FFT-ed filtered data comprises performing one-tap equalizing.

14. The method of claim 11, wherein shifting the filtered data cyclically comprises interchanging a position of a first half of the IFFT-ed symbol and a last half of the IFFT-ed symbol.

15. A packet reception apparatus for use in a wireless communication system based on filter bank-based multi-carrier (FBMC), the apparatus comprising:

a signal receiver configured to output a baseband signal by processing a symbol with an FBMC length;

a filter configured to filter the baseband signal with a prototype filter used in the wireless communication system to provide filtered data;

a controller configured to control, if data bursts are received and an overlapping factor of the wireless communication system is an even number, a switch to switch the output filtered data to a cyclic shift processor;

the cyclic shift processor configured to shift the filtered data cyclically;

a fast fourier transform (FFT) processor configured to perform M-point FFT on the cyclically shifted data;

an equalizer configured to equalize the FFT-ed data;

a demodulator configured to demodulate the equalized data; and

the switch configured to switch an output of the filtered data from the hardware controller to the cyclic shift processor or the FFT processor.

16. The apparatus of claim 15, wherein the equalizer is a one-tap equalizer.

17. The apparatus of claim 15, wherein the cyclic shift processor is configured to perform cyclic shift to interchange a position of a first half of the IFFT-ed symbol and a last half of the IFFT-ed symbol.