TRANSMISSION DEVICE, TRANSMISSION METHOD, RECEPTION DEVICE, RECEPTION METHOD, AND PROGRAM

• US 20180241490A1
• Filed: 08/26/2016
• Published: 08/23/2018
• Est. Priority Date: 09/10/2015
• Status: Active Grant

• Current Assignee: Sony Semiconductor Solutions Corporation (Sony Group Corp.)
• Original Assignee: Sony Semiconductor Solutions Corporation (Sony Group Corp.)
• Inventors: Shinagawa, Masashi, Noda, Makoto
• Granted Patent: US 10,554,318 B2
• Time in Patent Office: Days
• CPC Class Codes: H04J 3/06 Synchronising arrangements for television systems H04N5/04; bit-synchronisation H04L7/00
• CPC Class Codes: H04L 25/0202 Channel estimation
• CPC Class Codes: H04L 25/0226 sounding signals per se
• CPC Class Codes: H04L 27/18 Phase-modulated carrier systems, i.e. using phase-shift keying H04L27/32 takes precedence
• CPC Class Codes: H04L 7/0058 detection of error based on equalizer tap values
• CPC Class Codes: H04L 7/042 Detectors therefor, e.g. correlators, state machines digital correlators in general G06F17/15

Abstract

The present technology relates to a transmission device, a transmission method, a reception device, a reception method, and a program that can improve reception performance of a frame to which a preamble is added.

A transmission device of one aspect of the present technology generates a preamble including a sequence [d d . . . d −d] having iteration of a sequence d that is one of sequences a and b that are Golay complementary sequences, followed by an inverted sequence of the sequence d, and including a signal sequence in which a maximum value of an absolute value of a side lobe level of cross correlation between a sequence [d d −d] and a sequence [d −d] is 25 or less. The generated preamble is added to data to be transmitted in units of frames. The present technology can be applied to a device that transmits and receives data via a wireless transmission path.

Claims

1. A transmission device comprising:

a generation unit configured to generate a preamble including a sequence [d d . . . d −

d] having iteration of a sequence d that is one of sequences a and b that are Golay complementary sequences, followed by an inverted sequence of the sequence d, and including a signal sequence in which a maximum value of an absolute value of a side lobe level of cross correlation between a sequence [d d −

d] and a sequence [d −

d] is 25 or less; and

a transmission unit configured to transmit data to be transmitted in units of frames to which the preamble is added.

2. The transmission device according to claim 1, wherein

the generation unit generates the preamble including the sequence d in which the maximum value of an absolute value of a side lobe level becomes minimum.

3. The transmission device according to claim 1, wherein

the generation unit generates the preamble including the sequence d in which a code-word digital sum (CDS) is 0 and the CDS after π

/2-shift BPSK modulation is 0.

4. The transmission device according to claim 1, wherein

a bit length of the sequence d is 128.

5. The transmission device according to claim 1, wherein

the sequence d is a sequence obtained by applying [−

1, −

1, −

1, +1, +1, −

1, −

1] as a weight vector and [8, 4, 16, 2, 32, 1, 64] as a delay vector to a generation expression.

6. A transmission method comprising the steps of:

generating a preamble including a sequence [d d . . . d −

d] having iteration of a sequence d that is one of sequences a and b that are Golay complementary sequences, followed by an inverted sequence of the sequence d, and including a signal sequence in which a maximum value of an absolute value of a side lobe level of cross correlation between a sequence [d d −

d] and a sequence [d −

d] is 25 or less; and

transmitting data to be transmitted in units of frames to which the preamble is added.

7. A program for causing a computer to execute processing comprising the steps of:

generating a preamble including a sequence [d d . . . d −

d] having iteration of a sequence d that is one of sequences a and b that are Golay complementary sequences, followed by an inverted sequence of the sequence d, and including a signal sequence in which a maximum value of an absolute value of a side lobe level of cross correlation between a sequence [d d −

d] and a sequence [d −

d] is 25 or less; and

transmitting data to be transmitted in units of frames to which the preamble is added.

8. A transmission device comprising:

a generation unit configured to generate a preamble including a combination of sequences a and b that are Golay complementary sequences and sequences −

a and −

b that are inverted sequences of the sequences a and b, and

including, in a channel estimation sequence, a signal sequence of any of

a first basic sequence [a b a −

b a b −

a b],

a second basic sequence [a b −

a b a b a −

b],

a third basic sequence [a −

b a b a −

b −

a −

b],

a fourth basic sequence [a −

b −

a −

b a −

b a b],

inverted sequences of the first to fourth basic sequences,

reverse sequences of the first to fourth basic sequences, and

reverse sequences of the inverted sequences of the first to fourth basic sequences; and

a transmission unit configured to transmit data to be transmitted in units of frames to which the preamble is added.

9. The transmission device according to claim 8, wherein

the generation unit generates the preamble including, in the channel estimation sequence, a signal sequence of any of

[−

a b a b a −

b a b −

a b a b] that is a first sequence including the first basic sequence,

[a −

b a b −

a b a b a −

b a b] that is a second sequence including the second basic sequence,

[−

a −

b a −

b a b a −

b −

a −

b a −

b] that is a third sequence including the third basic sequence,

[a b a −

b −

a −

b a −

b a b a −

b] that is a fourth sequence including the fourth basic sequence,

inverted sequences of the first to fourth sequences,

reverse sequences of the first to fourth sequences, and

reverse sequences of the inverted sequences of the first to fourth sequences.

10. The transmission device according to claim 8, wherein

the generation unit generates the preamble including the sequences a and b in which a code-word digital sum (CDS) is 0 and the CDS after π

/2-shift BPSK modulation is 0.

11. The transmission device according to claim 8, wherein

bit lengths of the sequences a and b are 128.

12. A transmission method comprising the steps of:

generating a preamble including a combination of sequences a and b that are Golay complementary sequences and sequences −

a and −

b that are inverted sequences of the sequences a and b, and

including, in a channel estimation sequence, a signal sequence of any of

a first basic sequence [a b a −

b a b −

a b],

a second basic sequence [a b −

a b a b a −

b],

a third basic sequence [a −

b a b a −

b −

a −

b],

a fourth basic sequence [a −

b −

a −

b a −

b a b],

inverted sequences of the first to fourth basic sequences,

reverse sequences of the first to fourth basic sequences, and

reverse sequences of the inverted sequences of the first to fourth basic sequences; and

transmitting data to be transmitted in units of frames to which the preamble is added.

13. A program for causing a computer to execute processing comprising the steps of:

generating a preamble including a combination of sequences a and b that are Golay complementary sequences and sequences −

a and −

b that are inverted sequences of the sequences a and b, and

including, in a channel estimation sequence, a signal sequence of any of

a first basic sequence [a b a −

b a b −

a b],

a second basic sequence [a b −

a b a b a −

b],

a third basic sequence [a −

b a b a −

b −

a −

b],

a fourth basic sequence [a −

b −

a −

b a −

b a b],

inverted sequences of the first to fourth basic sequences,

reverse sequences of the first to fourth basic sequences, and

reverse sequences of the inverted sequences of the first to fourth basic sequences; and

transmitting data to be transmitted in units of frames to which the preamble is added.

14. A reception device comprising:

a reception unit configured to receive a transmission signal of data in units of frames to which a preamble is added, the preamble including a sequence [d d . . . d −

d] having iteration of a sequence d that is one of sequences a and b that are Golay complementary sequences, followed by an inverted sequence of the sequence d, and including a signal sequence in which a maximum value of an absolute value of a side lobe level of cross correlation between a sequence [d d −

d] and a sequence [d −

d] is 25 or less;

a demodulation unit configured to apply demodulation processing to a received signal; and

a synchronization unit configured to obtain cross correlation between a received signal sequence obtained by the demodulation processing and the sequence [d −

d], and perform frame synchronization on the basis of threshold detection or maximum value detection of a cross correlation value.

15. A reception method comprising the steps of:

receiving a transmission signal of data in units of frames to which a preamble is added, the preamble including a sequence [d d . . . d −

d] having iteration of a sequence d that is one of sequences a and b that are Golay complementary sequences, followed by an inverted sequence of the sequence d, and including a signal sequence in which a maximum value of an absolute value of a side lobe level of cross correlation between a sequence [d d −

d] and a sequence [d −

d] is 25 or less;

applying demodulation processing to a received signal; and

obtaining cross correlation between a received signal sequence obtained by the demodulation processing and the sequence [d −

d], and performing frame synchronization on the basis of threshold detection or maximum value detection of a cross correlation value.

16. A program for causing a computer to execute processing comprising the steps of:

receiving a transmission signal of data in units of frames to which a preamble is added, the preamble including a sequence [d d . . . d −

d] having iteration of a sequence d that is one of sequences a and b that are Golay complementary sequences, followed by an inverted sequence of the sequence d, and including a signal sequence in which a maximum value of an absolute value of a side lobe level of cross correlation between a sequence [d d −

d] and a sequence [d −

d] is 25 or less;

applying demodulation processing to a received signal; and

obtaining cross correlation between a received signal sequence obtained by the demodulation processing and the sequence [d −

d], and performing frame synchronization on the basis of threshold detection or maximum value detection of a cross correlation value.

17. A reception device comprising:

a reception unit configured to receive a transmission signal of data in units of frames to which a preamble is added, the preamble including a combination of sequences a and b that are Golay complementary sequences and sequences −

a and −

b that are inverted sequences of the sequences a and b, and

including, in a channel estimation sequence, a signal sequence of any of

a first basic sequence [a b a −

b a b −

a b],

a second basic sequence [a b −

a b a b a −

b],

a third basic sequence [a −

b a b a −

b −

a −

b],

a fourth basic sequence [a −

b −

a −

b a −

b a b],

inverted sequences of the first to fourth basic sequences,

reverse sequences of the first to fourth basic sequences, and

reverse sequences of the inverted sequences of the first to fourth basic sequences;

a demodulation unit configured to apply demodulation processing to a received signal;

a synchronization unit configured to perform frame synchronization on the basis of a received signal sequence obtained by the demodulation processing; and

an equalization unit configured to obtain first cross correlation between the received signal sequence and first four sequences of the signal sequences included in the channel estimation sequence, obtain second cross correlation between the received signal sequence and last four sequences of the signal sequences, and perform channel estimation on the basis of the first cross correlation and the second cross correlation.

18. A reception method comprising the steps of:

receiving a transmission signal of data in units of frames to which a preamble is added, the preamble including a combination of sequences a and b that are Golay complementary sequences and sequences −

a and −

b that are inverted sequences of the sequences a and b, and

including, in a channel estimation sequence, a signal sequence of any of

a first basic sequence [a b a −

b a b −

a b],

a second basic sequence [a b −

a b a b a −

b],

a third basic sequence [a −

b a b a −

b −

a −

b],

a fourth basic sequence [a −

b −

a −

b a −

b a b],

inverted sequences of the first to fourth basic sequences,

reverse sequences of the first to fourth basic sequences, and

reverse sequences of the inverted sequences of the first to fourth basic sequences;

applying demodulation processing to a received signal;

performing frame synchronization on the basis of a received signal sequence obtained by the demodulation processing;

obtaining first cross correlation between the received signal sequence and first four sequences of the signal sequences included in the channel estimation sequence, and obtaining second cross correlation between the received signal sequence and last four sequences of the signal sequences; and

performing channel estimation on the basis of the first cross correlation and the second cross correlation.

19. A program for causing a computer to execute processing comprising the steps of:

receiving a transmission signal of data in units of frames to which a preamble is added, the preamble including a combination of sequences a and b that are Golay complementary sequences and sequences −

a and −

b that are inverted sequences of the sequences a and b, and

including, in a channel estimation sequence, a signal sequence of any of

a first basic sequence [a b a −

b a b −

a b],

a second basic sequence [a b −

a b a b a −

b],

a third basic sequence [a −

b a b a −

b −

a −

b],

a fourth basic sequence [a −

b −

a −

b a −

b a b],

inverted sequences of the first to fourth basic sequences,

reverse sequences of the first to fourth basic sequences, and

reverse sequences of the inverted sequences of the first to fourth basic sequences;

applying demodulation processing to a received signal;

performing frame synchronization on the basis of a received signal sequence obtained by the demodulation processing;

obtaining first cross correlation between the received signal sequence and first four sequences of the signal sequences included in the channel estimation sequence, and obtaining second cross correlation between the received signal sequence and last four sequences of the signal sequences; and

performing channel estimation on the basis of the first cross correlation and the second cross correlation.