TRANSMISSION METHOD, RECEPTION METHOD, TRANSMITTER, AND RECEIVER

• US 20160315733A1
• Filed: 06/22/2016
• Published: 10/27/2016
• Est. Priority Date: 12/27/2013
• Status: Active Grant

• Current Assignee: Panasonic Intellectual Property Corporation of America (Panasonic Holdings Corporation)
• Original Assignee: Panasonic Intellectual Property Corporation of America (Panasonic Holdings Corporation)
• Inventors: MURAKAMI, YUTAKA, KIMURA, TOMOHIRO, OUCHI, MIKIHIRO
• Granted Patent: US 10,057,007 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: H03M 13/1102 Codes on graphs and decoding on graphs, e.g. low-density parity check [LDPC] codes
• CPC Class Codes: H03M 13/1165 QC-LDPC codes as defined for the digital video broadcasting [DVB] specifications, e.g. DVB-Satellite [DVB-S2]
• CPC Class Codes: H03M 13/255 with Low Density Parity Check [LDPC] codes
• CPC Class Codes: H04B 7/0413 MIMO systems
• CPC Class Codes: H04B 7/0669 using different channel coding between antennas space-time coding H04L1/0618
• CPC Class Codes: H04L 1/0041 Arrangements at the transmitter end
• CPC Class Codes: H04L 1/0045 Arrangements at the receiver end
• CPC Class Codes: H04L 1/0057 Block codes H04L1/0061, H04L1/0064 take precedence
• CPC Class Codes: H04L 1/0071 Use of interleaving interleaving per se H03M13/27
• CPC Class Codes: H04L 1/0643 block codes
• CPC Class Codes: H04L 2001/0093 Point-to-multipoint
• CPC Class Codes: H04L 27/18 Phase-modulated carrier systems, i.e. using phase-shift keying H04L27/32 takes precedence
• CPC Class Codes: H04L 27/34 Amplitude- and phase-modulated carrier systems, e.g. quadrature-amplitude modulated carrier systems

Abstract

In a transmission method according to one aspect of the present disclosure, a encoder performs error correction coding on an information bit string to generate a code word. A mapper modulates a first bit string in which the number of bits is the predetermined integral multiple of (X+Y) in the code word using a first scheme, the first scheme being a set of a modulation scheme in which an X-bit bit string is mapped to generate a first complex signal and a modulation scheme in which a Y-bit bit string is mapped to generate a second complex signal, and modulates a second bit string in which the first bit string is removed from the code word using a second scheme different from the first scheme.

Claims

1. A transmission method comprising:

performing error correction coding on an information bit string to generate a code word having a number of bits that is greater than a predetermined integral multiple of (X+Y);

modulating a first bit string in which the number of bits is the predetermined integral multiple of (X+Y) in the code word using a first scheme, the first scheme being a set of a modulation scheme in which an X-bit bit string is mapped to generate a first complex signal and a modulation scheme in which a Y-bit bit string is mapped to generate a second complex signal; and

modulating a second bit string in which the first bit string is removed from the code word using a second scheme different from the first scheme.

2. The transmission method according to claim 1, wherein the second scheme is a set of a modulation scheme in which an A-bit bit string is mapped to generate a third complex signal and a modulation scheme in which a B-bit bit string is mapped to generate a fourth complex signal, and

(A+B) is a divisor of the number of bits of the second bit string.

3. The transmission method according to claim 2, further comprising:

transmitting complex signals generated by performing space-time block coding on the first complex signal and the second complex signal.

4. The transmission method according to claim 1, wherein the second scheme is a modulation scheme which generates a single-stream complex signal by using the third complex signal and the fourth complex signal.

5. The transmission method according to claim 4, further comprising:

transmitting complex signals of a plurality of streams generated by performing the space-time block coding, the complex signals of a plurality of streams being generated by using the first scheme, and the single-stream complex signal generated by not performing the space-time block coding, the single-stream complex signal being generated by using the second scheme.

6. A transmitter comprising:

an encoder that performs error correction coding on an information bit string to generate a code word having a number of bits is greater than a predetermined integral multiple of (X+Y); and

a mapper that modulates a first bit string in which the number of bits is the predetermined integral multiple of (X+Y) in the code word using a first scheme, the first scheme being a set of a modulation scheme in which an X-bit bit string is mapped to generate a first complex signal and a modulation scheme in which a Y-bit bit string is mapped to generate a second complex signal, and modulates a second bit string in which the first bit string is removed from the code word using a second scheme different from the first scheme.

7. A reception method comprising:

demodulating a received signal to generate a demodulated signal according to a first scheme and a second scheme,

the first scheme being a scheme of a set of a modulation scheme in which an X-bit bit string is mapped to generate a first complex signal and a modulation scheme in which a Y-bit bit string is mapped to generate a second complex signal,

the second scheme being different from the first scheme,

the received signal being a signal obtained by receiving a transmitted signal transmitted from a transmitter,

the transmitted signal including a first signal and a second signal, the first signal being generated from a first bit string in which a number of bits is a predetermined integral multiple of (X+Y) using the first scheme, the second signal being generated from a second bit string in which the number of bits is not the predetermined integral multiple of (X+Y) using the second scheme, the first bit string and the second bit string constructing a code word being generated by performing error correction coding on information bit string; and

performing error correction decoding on the demodulated signal.

8. A receiver comprising:

a signal processor that demodulates a received signal to generate a demodulated signal according to a first scheme and a second scheme,

the first scheme being a scheme of a set of a modulation scheme in which an X-bit bit string is mapped to generate a first complex signal and a modulation scheme in which a Y-bit bit string is mapped to generate a second complex signal,

the second scheme being different from the first scheme,

the received signal being a signal obtained by receiving a transmitted signal transmitted from a transmitter,

the transmitted signal including a first signal and a second signal, the first signal being generated from a first bit string in which a number of bits is a predetermined integral multiple of (X+Y) using the first scheme, the second signal being generated from a second bit string in which the number of bits is not the predetermined integral multiple of (X+Y) using the second scheme, the first bit string and the second bit string constructing a code word being generated by performing error correction coding on information bit string; and

a decoder that performs error correction decoding on the demodulated signal.