WO2017043329A1 - 送信装置、送信方法、受信装置、受信方法、およびプログラム - Google Patents
送信装置、送信方法、受信装置、受信方法、およびプログラム Download PDFInfo
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L7/00—Arrangements for synchronising receiver with transmitter
- H04L7/04—Speed or phase control by synchronisation signals
- H04L7/041—Speed or phase control by synchronisation signals using special codes as synchronising signal
- H04L7/042—Detectors therefor, e.g. correlators, state machines
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04J—MULTIPLEX COMMUNICATION
- H04J3/00—Time-division multiplex systems
- H04J3/02—Details
- H04J3/06—Synchronising arrangements
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L25/00—Baseband systems
- H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
- H04L25/0202—Channel estimation
- H04L25/0224—Channel estimation using sounding signals
- H04L25/0226—Channel estimation using sounding signals sounding signals per se
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/18—Phase-modulated carrier systems, i.e. using phase-shift keying
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L25/00—Baseband systems
- H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
- H04L25/0202—Channel estimation
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L7/00—Arrangements for synchronising receiver with transmitter
- H04L7/0054—Detection of the synchronisation error by features other than the received signal transition
- H04L7/0058—Detection of the synchronisation error by features other than the received signal transition detection of error based on equalizer tap values
Definitions
- the present technology relates to a transmission device, a transmission method, a reception device, a reception method, and a program, and in particular, a transmission device, a transmission method, a reception device, and a reception that can improve reception performance of a frame to which a preamble is added.
- the present invention relates to a method and a program.
- a bit sequence of transmission data is divided into frames or packets, and data is transmitted using the frames or packets.
- the frame and the packet are collectively referred to as a frame as appropriate.
- a frame is a unit of a group of bit sequences transmitted at a time.
- the transmitting apparatus When transmitting data in frame units, the transmitting apparatus inserts a known signal for synchronization at the head of the frame so that the receiving apparatus can synchronize.
- the receiving-side apparatus performs frame synchronization (frame ⁇ synchronization) by detecting a known signal for synchronization, and acquires transmission data stored in the frame.
- one frame is configured by placing a preamble composed of known signals at the head, and placing a header and a payload following the preamble.
- a known signal for synchronization is also included in the preamble.
- the preamble includes a known signal for channel estimation.
- the header includes frame attribute information such as a transmission method and an address, and the payload includes a bit sequence of divided transmission data.
- MAC Medium Access Control
- PHY Physical Layer
- Enhancements Very for High High Throughput in 60 degrees GHz Band IEEE Std 802.11ad-2012 J. Min et. Al.
- Synchronization Techniques for a Frequency-Hopped Wireless Transceiver IEEE VETEC, vol. 1, pp. 183-187, 1996.
- M. J. E. Golay “Complementary series,” IRE Transactions on Information Theory, vol. 7, Issue 2, pp. 82-87, Apr. 1961. S. Z.
- Frame synchronization is performed by calculating the cross-correlation between the received signal sequence and the known signal sequence, and specifying the position where the cross-correlation equal to or greater than the threshold is obtained or the position where the maximum cross-correlation peak is obtained. Is called. In order to reduce the failure probability of frame synchronization, it is required to reduce the level of side lobes that occur outside the peak position.
- Channel estimation uses the cross-correlation peak position between the received signal sequence and the known signal sequence as the main wave position, forms a cross-correlation interval before and after it, and detects paths that appear within the cross-correlation interval This is done. In order to be able to detect a long delay path, it is required to secure a longer cross-correlation interval.
- the present technology has been made in view of such a situation, and is intended to improve the reception performance of a frame to which a preamble is added.
- the transmitting apparatus provides a sequence [d d ... d ⁇ in which the inverted sequence of the sequence d is followed by repetition of the sequence d that is one of the sequences a and b that are Golay complementary sequences. d], and a generator that generates a preamble including a signal sequence whose absolute value of the absolute value of the side lobe level of the cross-correlation between the sequence [d d -d] and the sequence [d -d] is 25 or less, A transmission unit that transmits data to be transmitted in units of frames to which the preamble is added.
- the transmission device includes 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 is a first basic sequence [A b a -b a b -a b], the second basic sequence [a b -a b a b a ⁇ ⁇ -b], and the third basic sequence [a -b a b a- b -a -b], the fourth basic sequence [a -b -a -b a -b], the inverted series of the first to fourth basic sequences, the first to fourth basics
- a generation unit that generates a preamble including a signal estimation sequence of a reverse sequence of a sequence and a reverse sequence of an inverted sequence of the first to fourth basic sequences in a channel estimation sequence; And a transmission unit that transmits the frame added with the preamble.
- the receiving apparatus provides a sequence [d d ... d ⁇ in which the inversion sequence of the sequence d is followed by the repetition of the sequence d which is one of the sequences a and b which are Golay complementary sequences. d], and data in units of frames to which a preamble including a signal sequence having a maximum absolute value of the side lobe level of the cross-correlation between the sequence [d d -d] and the sequence [d -d] is 25 or less is added.
- a receiving unit that receives the transmission signal, a demodulating unit that performs a demodulation process on the received signal, a received signal sequence obtained by the demodulation process, and a cross-correlation or sequence [d [d ⁇ d -d] -d], and a synchronization unit that performs frame synchronization based on threshold value detection or maximum value detection of the cross-correlation value.
- a receiving apparatus includes 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.
- [A b a -b a b -a b] the second basic sequence [a b -a b a b a ⁇ ⁇ -b] and the third basic sequence [a -b a b a- b -a -b]
- the fourth basic sequence [a -b -a -b a -b a b]
- the inverted series of the first to fourth basic sequences the first to fourth basics
- a receiving unit a demodulating unit that performs demodulation processing on the received signal; and frame synchronization based on the received signal sequence obtained by the demodulation processing.
- a first cross-correlation between the received signal sequence and the first four sequences of the signal sequence included in the channel estimation sequence, and the received signal sequence and the latter half of the signal sequence And an equalizer for obtaining a second cross-correlation with the sequence and performing channel estimation based on the first cross-correlation and the second cross-correlation.
- FIG. 2 is a diagram illustrating a configuration of an IEEE 802.11ad preamble.
- FIG. It is a figure which shows the structure of a frame synchronizer.
- FIG. It is a figure which shows the cross correlation characteristic of the received signal and reference series in IEEE802.15.3c.
- FIG. 28 is a block diagram illustrating a functional configuration example of the computer of FIG. 27. It is a flowchart explaining the process of the computer which determines GCS (a) and b.
- Example of a preamble 2. About IEEE 802.15.3c and IEEE 802.11ad 3. Preamble concept using this technology 4. Transmission system 5. Preamble to which this technology is applied 6. Configuration and operation of each device How to determine GCS a and b 8. Other
- FIG. 1 is a diagram illustrating a configuration example of a frame.
- data to be transmitted is stored in a plurality of frames, and data is transmitted in units of frames.
- the data communication standard over the wireless transmission path includes, for example, IEEE 802.15.3c, the international standard for wireless PAN (Personal Area Network) using the 60 GHz band, and Wireless LAN (Local Area Network) using the 60 GHz band.
- IEEE 802.11ad an international standard for
- a preamble is arranged at the head of each frame, and a header and a payload are arranged following the preamble.
- the preamble is composed of known signals, and the header includes frame attribute information such as a transmission method and an address.
- the payload includes a bit sequence of divided transmission data.
- FIG. 2 is a diagram illustrating a configuration example of a preamble.
- the preamble is composed of a frame detection signal sequence A that is a signal sequence for frame detection, a frame synchronization signal sequence B that is a signal sequence for frame synchronization, and a signal sequence C for channel estimation that is a signal sequence for channel estimation. Is done.
- the apparatus that has received such a preamble performs frame detection using AGC (Auto-gain control) using the frame detection signal sequence A and frame synchronization using the frame synchronization signal sequence B. Further, the reception-side apparatus performs channel estimation using the channel estimation signal sequence C. A part of each series may be shared with other series.
- AGC Auto-gain control
- IEEE 802.15.3c and IEEE 802.11ad ⁇ 2-1.
- Preamble configuration> Before describing the preamble to which the present technology is applied, the preambles of IEEE 802.15.3c and IEEE 802.11ad will be described. In IEEE 802.15.3c and IEEE 802.11ad, a preamble configuration as shown in FIG. 2 is adopted. IEEE 802.15.3c and IEEE 802.11ad are described in Non-Patent Documents 1 and 2, respectively.
- FIG. 3A and FIG. 3B are diagrams showing the configuration of the IEEE 802.15.3c preamble (Single carrier (SC)) PHY preamble).
- 3A shows the configuration of the preamble in the high rate mode
- FIG. 3B shows the configuration of the preamble in the medium rate mode.
- GCS a, b which is a 128-symbol (128 bits) Golay complementary sequence (GCS), and GCS -a, which is a bit-inverted sequence of GCS a, b. Consists of -b.
- the frame detection signal sequence A constituting the preamble shown in FIG. 3A is configured by repeating GCS a 14 times.
- the frame synchronization signal sequence B is composed of [-a -a a a]
- the channel estimation signal sequence C is composed of [b a -b a b a -b a b].
- the preamble of IEEE5.3802.15.3c will be described using the preamble of the High rate mode shown in A of FIG.
- FIG. 4 is a diagram showing the configuration of the IEEE® 802.11ad preamble (SC® PHY preamble).
- the IEEE 802.11ad preamble is also composed of GCS 128 a and b of 128 symbols in length and GCS -a and -b, which are bit-inverted sequences of GCS a and b.
- the frame detection signal sequence A constituting the preamble shown in FIG. 4 is configured by repeating GCS a 16 times.
- the frame synchronization signal sequence B is composed of GCS -a
- the channel estimation signal sequence C is composed of [-b -a b -a -b a -b -a -b].
- GCSs constituting the preambles of IEEE 802.15.3c and IEEE 802.11ad are represented by the same symbols a and b, but actually, GCS a, b of IEEE 802.15.3c And IEEE ⁇ 802.11ad GCS a, b have different signal sequences.
- the first GCS -a of the signal sequence B for frame synchronization is used for frame synchronization, and the last three [-a a a] (A in Fig. 3) or [a -a a] (B in FIG. 3) is considered to be used for detecting the type of header (high ⁇ ⁇ rate, medium rate) that follows.
- a sequence including a frame detection signal sequence A and a frame synchronization signal sequence B is defined as Short training field (STF). It consists of 16 repetitions of GCS a corresponding to A and GCS -a corresponding to the signal sequence B for frame synchronization.
- STF Short training field
- FIG. 5 is a diagram illustrating a configuration example of a frame synchronization apparatus that performs frame synchronization based on the preamble as described above.
- FIG. 5 shows an apparatus for performing frame synchronization based on a preamble whose signal sequence B for frame synchronization is [-a a a] when a is represented by [1 1 1 -1 -1 1 -1].
- the configuration is shown.
- the configuration of the frame synchronization apparatus shown in FIG. 5 is disclosed in Non-Patent Document 3.
- the frame synchronizer of FIG. 5 calculates the cross-correlation between a received signal sequence input with +1 or -1 as an element and a, and determines the added value every 7 times up to 14 hours before the cross-correlation as a threshold value. To do.
- the frame synchronization apparatus performs frame synchronization by determining the time when the added value exceeds the threshold as the reception time of the last symbol of the signal sequence B for frame synchronization.
- FIGS. 6 and 7 show the cross-correlation between the noiseless received signal and the reference sequence R when the frame synchronization reference sequence R is [a -a] in the cases of IEEE 802.15.3c and IEEE 802.11ad, respectively. It is a figure which shows a characteristic.
- the horizontal axis indicates the time slot (number of bits from the head), and the vertical axis indicates the cross-correlation value.
- the position (time) of the peak of the cross-correlation value enclosed by circles # 1 and # 11 is determined as the position of the last symbol of -a that is the leading sequence of the signal sequence B for frame synchronization. Frame synchronization is performed.
- the side lobe level be as small as possible.
- IEEE802.15.3c GCSa, b and IEEE802.11ad GCSa, b are different signal sequences
- IEEE802.15.3c and IEEE 802.11ad have different sidelobe levels.
- circles # 2 and # 3 in FIG. 6 in IEEE 802.15.3c, the maximum absolute value of the side lobe level is detected as 26.
- circles # 12 and # 13 in FIG. 7 in IEEE ⁇ ⁇ 802.11.ad, the maximum absolute value of the side lobe level is detected as 38.
- GCS definition and generation method Here, an example of GCS definition and generation method will be described.
- the definition of GCS is described in Non-Patent Document 4, and the method of generating GCS is described in Non-Patent Document 5.
- GCS satisfies the following equations (1) to (3) It is defined as a series (Non-Patent Document 4).
- ⁇ (i) is a Kronecker delta function.
- n, delay vector D, and weight vector W are expressed by the following equations (8)-(10).
- the delay vector D is an arbitrary combination of ⁇ 1, 2, 4,..., 2 N-1 ⁇ , and W n is +1 or ⁇ 1.
- Equations (4)-(7) mean that a GCS having a length of 2n can be generated by concatenating GCS a and b.
- Patent Document 1 proposes a method of generating an extended GCS from GCS , a, b using a Hadamard matrix and constructing a preamble using the generated extended GCS.
- FIG. 8 is a diagram showing the concept of channel estimation described in Non-Patent Document 6.
- the preamble shown in the upper part of FIG. 8 is an IEEE 802.15.3c preamble shown in A of FIG.
- the receiving-side apparatus cross-correlates c a (t between [b a] (a 256 ) concatenated GCS a and b and the received signal at time t. ).
- the receiving-side apparatus calculates a cross-correlation c b (t) at time t between [ ⁇ b a] (b 256 ) obtained by concatenating GCS a and b and the received signal.
- the upper graph of three graphs shown in FIG. 8 shows a cross-correlation c a between the received signal r and a 256 (t), the cross-correlation c b of the middle of the graph and b 256 and the received signal r ( t).
- c (t) determining the cross-correlation c (t) by adding the c a (t) of the 256-symbol delay values c a (t-256).
- c (t) is represented by the following formula (11).
- the lower graph of FIG. 8 shows c (t).
- the value of c (t) is 0 in the interval of ⁇ 128 symbols centered on the cross-correlation peak position, which is the same as the lengths of a 256 and b 256 .
- the receiving device adds a c (t) and a 512 symbol delay value c (t-512) of c (t) to obtain a channel impulse response.
- a channel impulse response as shown in FIG. 9 is obtained.
- ⁇ ZCC zero-cross correlation
- FIG. 10 is a diagram showing the concept of channel estimation using the IEEE 802.11ad preamble.
- the preamble shown in the upper part of FIG. 10 is the IEEE 802.11ad preamble shown in FIG.
- the receiving device cross-correlates GCS a and b concatenated [-b -a b -a] (u 512 ) with the received signal at time t.
- c u (t) is calculated.
- the receiving-side apparatus calculates a cross-correlation c v (t) at time t between [ ⁇ b a ⁇ b ⁇ a] (v 512 ) obtained by concatenating GCS a and b and the received signal.
- the upper graph of the three graphs shown in FIG. 10 shows the cross-correlation c u (t) between u 512 and the received signal r, and the middle graph shows the cross-correlation c v (between v 512 and the received signal r. t).
- the device on the receiving side calculates the c u 512-symbol delay value c u of (t) (t-512) by adding the cross-correlation c (t).
- the ZCC section realized by channel estimation using the signal sequence C for channel estimation of IEEE 802.11ad is IEEE 802.15.3c.
- the interval is ⁇ 128 symbols relative to the peak. This is because u 512 and v 512 used for the calculation of cross-correlation are not complementary sequences.
- Equation (12) Substituting equation (12) into equation (6) and substituting equation (13) into equation (7), a n (i) and b n (i) are expressed by the following equations (14) and (15), respectively. Is done.
- a n in which each element is represented by the formula (14) is a 512-bit length of the GCS.
- b n where each element is represented by the formula (15) containing two a n-2 sections and two b n-2 terms, the 512 bit length of GCS.
- a n and b n are complementary sequences, for example, GCS a n and b n having a length of four times 512 bits are formed from GCS having a length of 128 bits, and this is a part of signal sequence C for channel estimation. As a result, a ZCC interval of ⁇ 256 symbols can be realized.
- the preamble channel estimation signal sequence C to which the present technology is applied includes [a b a -b a b -a b], [a b -a b a b a -b], [a -b a shown in FIG. b a -b -a -b], [a -b -a -b a -b], their inverted sequences, and their reverse sequences including inverted sequences It is a series that includes any one of them.
- [A b a -b a b -a b], [a b -a b a b a -b], [a -b a b a -b -a -b], [a -b- a -b a -b] is called a basic sequence in the sense that it is a sequence in which other sequences are added before and after this.
- a n-2 and b n-2 are 128-bit GCSs, and a n-2 is represented by a and b n-2 is represented by b, and the above four basic sequences are obtained.
- a first basic sequence [a b a -b a b -a b] is a GCS when weight vector W is represented by [+1 +1], the first half of [a b a -b] corresponds to a n, Subsequent [ab -ab] corresponds to b n .
- a second basic sequence [a b -a b a b a -b] is a GCS when weight vector W is represented by +1 -1], the first half of [a b -a b] corresponds to a n, Subsequent [aba -b] corresponds to b n .
- a third basic sequence [a -b a b a -b -a -b] is a GCS when weight vector W is represented by [-1 +1], the first half of [a -b a b] is a n [A -b -a -b] following it corresponds to b n .
- the fourth basic sequence [a -b -a -ba -bab] is a GCS when the weight vector W is represented by [-1 -1], and the first half [a -b -a -b ] corresponds to a n, followed [a -b a b] is equivalent to b n.
- the inverted sequence is a sequence in which +/- is exchanged
- the reverse sequence is a sequence in which the order is changed from right to left.
- the channel estimation signal sequence C is one of the following 16 sequences. (1) [-a b a b a -b a b -a b a b] (2) [a -b a b -a b a b a -b a b] (3) [-a -b a -b a b a -b -a -b a -b] (4) [a b a -b -a -b a -b a -b a b a -b]
- Sequence (1) is a sequence in which [-a b] is added before [a [b a -b a b -a b], which is the first basic sequence, and [a b] is added after.
- the series (2) is a series in which [a -b] is added before [a b -a b a b a -b], which is the second basic series, and [a b] is added after.
- Sequence (4) is a sequence in which [a b] is added before [a -b -a -b a -b a b] and [a -b] is added after [4] is there.
- Series (5) through (8) are inverted series of series (1) through (4), respectively.
- the sequences (9) to (16) are reverse sequences of the sequences (1) to (8), respectively.
- the preamble frame synchronization signal sequence B to which the present technology is applied is composed of 1 GCS of GCS a, b or its inverted sequence, and the 1 GCS is the first 1 GCS of the channel estimation signal sequence C. You may share as.
- the first 1 GCS sequence with GCS a is used when the frame synchronization signal sequence B is configured with GCS a.
- the first 1 GCS sequence of GCS -a is used when the frame synchronization signal sequence B is composed of GCS -a.
- a sequence in which the first 1 GCS is GCS ⁇ ⁇ ⁇ ⁇ b is used when the frame synchronization signal sequence B is composed of GCS ⁇ b
- a sequence in which the first 1 GCS is GCS -b is the frame synchronization signal sequence B is GCS Used when configured with -b.
- FIG. 13 is a diagram illustrating a configuration example of a transmission system according to an embodiment of the present technology.
- the transmission system in FIG. 13 includes a transmission device 1 and a reception device 2.
- the transmission apparatus 1 performs processing such as error correction coding, insertion of a header / preamble, and modulation on data to be transmitted.
- data is transmitted in units of frames having the configuration of FIG. Each frame includes a preamble having the configuration shown in FIG.
- various data such as AV (Audio Visual) data is processed as transmission target data.
- the transmission device 1 transmits data obtained by performing various processes to the reception device 2 by wireless communication using a predetermined frequency band such as a 60 GHz band.
- the receiving device 2 demodulates the received signal and performs frame synchronization using the preamble.
- the receiving apparatus 2 performs channel estimation using a preamble, performs equalization processing, and then performs processing such as error correction to acquire data to be transmitted.
- FIG. 14 is a diagram illustrating a configuration example of a preamble to which the present technology is applied.
- the preamble to which the present technology is applied is appropriately referred to as a new preamble.
- the new preamble is composed of GCS a and b of 128 symbols in length, and GCS -a and-b which are bit-inverted sequences of GCS a and b, similar to the IEEE 802.15.3c and IEEE 802.11ad preambles. .
- the GCS'a and b constituting the new preamble are different from the GCS'a and b constituting the IEEE 802.15.3c and IEEE 802.11ad preambles.
- the frame detection signal sequence A is composed of 14 repetitions of GCSGa.
- the number of repetitions is arbitrary.
- the frame synchronization signal sequence B following the frame detection signal sequence A is composed of GCSG-a.
- the frame detection signal sequence A can be GCS-a repetition instead of GCS-a repetition.
- the frame synchronization signal sequence B is GCS a.
- the frame detection signal sequence A can be repeated GCSGb.
- the frame detection signal sequence A is GCS b
- the frame synchronization signal sequence B is GCS -b.
- the frame detection signal sequence A may be GCS ⁇ -b.
- the frame synchronization signal sequence B is GCS b.
- the channel estimation signal sequence C includes [ ⁇ a b a b a -b a] including the GCS -a of the frame synchronization signal sequence B shared as the head GCS of the channel estimation signal sequence C. b -a b a b].
- the configuration of the new preamble shown in FIG. 14 is a configuration when the sequence (1) of the 16 sequences is used as the channel estimation signal sequence C.
- Any one of the sequences (1) to (16) is used as a channel estimation signal sequence C constituting a new preamble as shown in FIG.
- a part of the channel estimation signal sequence C can be shared as the GCS constituting the frame synchronization signal sequence B.
- FIG. 15 is a diagram showing the length of the new preamble.
- the total length of the new preamble is the same as that of the IEEE 802.11ad preamble, which is shorter by 1 GCS than the length of the IEEE 802.15.3c preamble.
- FIG. 16 is a diagram illustrating an example of GCS a and b having a sequence length of 128 constituting a new preamble.
- GCSa is expressed in binary notation as follows. +1 -1 +1 -1 +1 -1 +1 -1 +1 -1 +1 -1 +1 -1 +1 -1 +1 -1 +1 +1 -1 +1 -1 +1 +1 -1 +1 -1 +1 +1 -1 +1 -1 +1 +1 -1 -1 +1 +1 -1 -1 +1 +1 -1 -1 -1 +1 +1 -1 -1 -1 +1 +1 +1 +1 +1 +1 +1 +1 +1 +1 +1 +1 +1 +1 +1 +1 +1 +1 +1 +1 +1 +1 +1 +1 +1 +1 +1 +1 +1 +1 +1 +1 +1 +1 +1 +1 +1 +1 +1 +1 +1 +1 +1 +1 +1 +1 +1 +1 +1 +1 +1 +1 +1 +1 +1 +1 +1 +1 +1 +1 +1 +1 +1 +1 +1 +1 +1 +1 +1 -1
- GCS a is A5556696C33300F00FFFCC3C6999AA5A in hexadecimal notation.
- GCS b is expressed in binary notation as follows. +1 -1 +1 -1 +1 -1 +1 -1 +1 -1 +1 -1 +1 -1 +1 -1 +1 -1 +1 +1 -1 +1 -1 +1 -1 +1 -1 +1 -1 +1 -1 +1 -1 -1 +1 +1 -1 -1 +1 +1 -1 -1 -1 -1 +1 +1 +1 -1 -1 -1 -1 +1 +1 +1 +1 -1 -1 -1 -1 -1 -1 -1 -1 +1 +1 +1 +1 +1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 +1 +1 +1 +1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 +1 +1 +1 +1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1
- GCS b is A5556696C33300F0F00033C3966655A5 in hexadecimal notation.
- the upper left bit is the first transmitted bit
- the lower right bit is the last transmitted bit.
- the bits on the right are transmitted in order, and when the rightmost bit of a certain row is transmitted, the bits are transmitted sequentially from the leftmost bit of the next row.
- FIG. 17 is a diagram showing a weight vector W and a delay vector D for generating GCSs a and b constituting a new preamble.
- GCS a, b in FIG. 16 is a weight vector W [-1, -1, -1, +1, +1, -1, -1] and a delay vector D [8, 4, 16, 2, 32, 1 , 64] is applied to equations (6) and (7).
- FIG. 17 shows a weight vector W and a delay vector D that are used to generate a GCS that constitutes a preamble of IEEE802.15.3c and IEEE802.11ad.
- FIG. 18 is a diagram showing the side lobe reduction effect when a new preamble is used.
- FIG. 18 is a diagram showing the cross-correlation characteristics between the noiseless received signal and the reference sequence R when the frame synchronization reference sequence R is [a -a] for the new preamble.
- the side lobe level can be reduced and the synchronization performance can be improved.
- a cross-correlation value between the received signal and, for example, [a -a] is obtained. Further, the frame synchronization is determined by determining the peak time of the cross-correlation value surrounded by circle # 51 exceeding the threshold as the reception time of the last symbol of GCS -a which is the signal sequence of the frame synchronization signal sequence B Done.
- FIG. 19 is a diagram illustrating the concept of channel estimation using a new preamble.
- the receiver 2 calculates a cross-correlation c a (t) at time t between [a b a -b] (a 512 ) obtained by concatenating GCS a and b and the received signal. To do. Further, the receiving device 2 calculates a cross-correlation c b (t) at time t between [a b ⁇ a b] (b 512 ) obtained by concatenating GCS a and b and the received signal.
- a 512 is the first four signal sequences of the eight signal sequences that make up the first basic sequence
- b 512 is the latter four of the eight signal sequences that make up the first basic sequence.
- the receiving apparatus 2 calculates a c b (t), 512 symbol delay value of c a (t) c a ( t-512) and by adding the c a (t).
- the lower graph in FIG. 19 shows c (t).
- the receiving device 2 performs channel estimation using the cross-correlation value enclosed by a broken line as a channel impulse response.
- a ZCC interval of ⁇ 256 symbols with respect to the peak is realized. This indicates that a delayed wave within ⁇ 256 symbols can be estimated with respect to the main wave.
- the ZCC interval can be doubled compared to the case of using the IEEE 802.15.3c or IEEE 802.11ad preamble, and the channel estimation performance can be improved.
- the ZCC section in the preamble of IEEE802.15.3c or IEEE802.11ad is a section of ⁇ 128 symbols with respect to the peak.
- a 512 and b 512 used for calculating the cross-correlation with the received signal at the time of channel estimation are switched by the channel estimation signal sequence C.
- a 512 is the first four signal sequences of the eight signal sequences constituting the basic sequence included in the channel estimation signal sequence C
- b 512 is the basic sequence included in the channel estimation signal sequence C. Of the eight signal sequences, the latter four signal sequences are obtained.
- the first four signal sequences [a b -a b] are a 512 and the subsequent latter 4 Channel estimation is performed using [aba -b], which is one signal sequence, as b 512 .
- FIG. 21 is a diagram showing the effect when a new preamble is used.
- FIG. 21 shows the carrier error-to-noise ratio (CNR) dependence of the frame error rate when the reference sequence R for frame synchronization is [a -a].
- the vertical axis in FIG. 21 represents the frame error rate, and the horizontal axis represents CNR.
- the frame error rate includes an undetected probability (missed detection probability) and a false detection probability (false alarm probability).
- the undetected probability is a probability that a frame cannot be detected
- the false detection probability is a probability that an erroneous position is detected as a frame position.
- the determination threshold for frame synchronization is 80.
- the white square represents the undetected probability of the frame when the new preamble is used, and the white triangle represents the undetected probability of the frame in the case of IEEE802.15.3c. Since the cross-correlation peak value does not change between the case of using the new preamble and the case of IEEE 802.15.3c, there is no difference in the undetected probability of the frame.
- the black square represents the false detection probability of the frame position when the new preamble is used
- the black triangle represents the false detection probability of the frame position in the case of IEEE802.15.3c.
- FIG. 22 is a block diagram illustrating a configuration example of the transmission device 1.
- the transmission apparatus 1 includes a preamble generation unit 101, a header generation unit 102, a frame generation unit 103, an error correction coding unit 104, a modulation unit 105, a transmission unit 106, and a transmission antenna 107.
- the preamble generation unit 101 generates a new preamble having the configuration shown in FIG. 14 and outputs the new preamble to the frame generation unit 103, for example.
- the header generation unit 102 generates a header including information related to error correction coding of payload data, a modulation method, and the like, and outputs the header to the frame generation unit 103.
- the frame generation unit 103 generates the frame shown in FIG. 1 by adding the preamble supplied from the preamble generation unit 101 and the header supplied from the header generation unit 102 to the payload storing the transmission data, and generates an error correction code. To the conversion unit 104.
- the error correction encoding unit 104 performs error correction encoding of the data supplied from the frame generation unit 103 by a predetermined method, and outputs the data after error correction encoding to the modulation unit 105.
- Modulation section 105 modulates the data after correction coding supplied from error correction coding section 104 by a predetermined method, and outputs a signal sequence of transmission symbols to transmission section 106.
- the transmission unit 106 performs various processes such as D / A conversion and band limitation on the signal sequence supplied from the modulation unit 105, converts the analog baseband signal into an RF signal, and transmits the RF signal from the transmission antenna 107.
- FIG. 23 is a block diagram illustrating a configuration example of the preamble generation unit 101 in FIG.
- the preamble generation unit 101 includes a GCS generation unit 121, a selector 122, and a multiplier 123.
- the operations of the selector 122 and the multiplier 123 are controlled by the control unit 111 not shown in FIG.
- the control unit 111 outputs a selection signal to the selector 122 and outputs a polarity signal to the multiplier 123 according to the structure of the new preamble.
- the selection signal is a signal indicating which one of GCS a and GCS b is selected.
- the polarity signal is a signal indicating which value of +1 or ⁇ 1 is multiplied with the sequence selected by the selector 122.
- the GCS generation unit 121 generates and outputs GCS a and GCS b that constitute a new preamble.
- the GCS generation unit 121 reads GCSa and b generated in advance from the internal RAM, ROM, and register and outputs them.
- the GCS generation unit 121 generates and outputs GCSa and b by applying the delay vector D and the weight vector W to Equations (6) and (7).
- the selector 122 selects one of the GCSa and b supplied from the GCS generation unit 121 according to the selection signal supplied from the control unit 111, and sequentially outputs them.
- Multiplier 123 multiplies the signal sequence supplied from selector 122 by +1 or ⁇ 1 according to the polarity signal supplied from control unit 111, and outputs a signal sequence of a new preamble.
- FIG. 24 is a block diagram illustrating a configuration example of the receiving device 2.
- the receiving apparatus 2 includes a receiving antenna 201, a receiving unit 202, a demodulating unit 203, a synchronizing unit 204, an equalizing unit 205, an error correcting unit 206, and a signal processing unit 207.
- a transmission signal transmitted from the transmission device 1 is received by the reception antenna 201 and input to the reception unit 202 as an RF signal.
- the receiving unit 202 converts the RF signal supplied from the receiving antenna 201 into an analog baseband signal, performs various processes such as signal level adjustment, band limitation, and A / D conversion, and outputs the result.
- Demodulation section 203 demodulates the received symbols according to a demodulation scheme corresponding to the modulation scheme in transmitting apparatus 1 and outputs a signal sequence of the received symbols.
- the signal sequence output from the demodulation unit 203 is supplied to the synchronization unit 204.
- the synchronization unit 204 obtains a cross-correlation between the signal sequence supplied from the demodulation unit 203 and, for example, [a -a], and performs frame synchronization as described with reference to FIG.
- the synchronization unit 204 outputs a signal indicating the reception time (position) of the last bit of the last symbol constituting the frame synchronization signal sequence B.
- the equalization unit 205 performs channel estimation using the channel estimation signal sequence C as described with reference to FIG. 19 and performs equalization processing on the signal supplied from the demodulation unit 203.
- the equalization unit 205 outputs the header and payload data obtained by performing the equalization process to the error correction unit 206.
- the error correction unit 206 performs error correction on the data supplied from the equalization unit 205 and outputs data after error correction.
- the signal processing unit 207 acquires error-corrected data transmitted from the transmission device 1 and performs each process. For example, when the data to be transmitted is AV data, the signal processing unit 207 outputs AV data to a display device (not shown) to display a video on a display, or outputs sound from a speaker.
- step S1 the preamble generation unit 101 generates a new preamble having the configuration shown in FIG.
- step S2 the header generation unit 102 generates a header including information on error correction coding of payload data, a modulation method, and the like.
- step S3 the frame generation unit 103 generates a frame by adding the new preamble generated by the preamble generation unit 101 and the header generated by the header generation unit 102 to the payload storing the transmission data.
- step S4 the error correction encoding unit 104 performs error correction encoding of the data supplied from the frame generation unit 103.
- step S5 the modulation unit 105 modulates the data after correction encoding supplied from the error correction encoding unit 104, and outputs a signal sequence of transmission symbols.
- step S6 the transmission unit 106 performs processing such as D / A conversion and band limitation on the signal sequence supplied from the modulation unit 105, converts the analog baseband signal into an RF signal, and transmits the signal from the transmission antenna 107. To do.
- the above processing is repeatedly performed while the transmission target data is input to the transmission device 1.
- step S11 the reception unit 202 of the reception device 2 converts the RF signal supplied from the reception antenna 201 into an analog baseband signal, and performs various processes such as signal level adjustment, band limitation, and A / D conversion. .
- step S12 the demodulation unit 203 demodulates the received symbol according to a demodulation method corresponding to the modulation method in the transmission apparatus 1, and outputs a signal sequence of the received symbol.
- step S13 the synchronization unit 204 obtains a cross-correlation between the signal sequence supplied from the demodulation unit 203 and, for example, [a -a], and performs frame synchronization as described with reference to FIG.
- the synchronization unit 204 outputs a signal representing the reception time of the last bit of the last symbol constituting the frame synchronization signal sequence B.
- step S14 the equalization unit 205 performs channel estimation using the channel estimation signal sequence C as described with reference to FIG.
- step S15 the equalization unit 205 performs equalization processing on the signal sequence signal based on the channel estimation result.
- the equalization unit 205 outputs the header and payload data obtained by performing the equalization process to the error correction unit 206.
- step S16 the error correction unit 206 performs error correction on the data supplied from the equalization unit 205 and outputs data after error correction.
- FIG. 27 is a block diagram illustrating a hardware configuration example of the computer 301 that determines GCS a and b. The selection of GCS a and b is performed in advance before data transmission.
- the CPU Central Processing Unit
- ROM Read Only Memory
- RAM Random Access Memory
- an input / output interface 315 is connected to the bus 314.
- the input / output interface 315 is connected to an input unit 316 including a keyboard and a mouse, and an output unit 317 including a display and a speaker.
- the input / output interface 315 is connected to a storage unit 318 including a hard disk and a non-volatile memory, a communication unit 319 including a network interface, and a drive 320 for driving the removable medium 321.
- FIG. 28 is a block diagram illustrating a functional configuration example of the computer 301 in FIG.
- FIG. 28 At least a part of the functional units shown in FIG. 28 is realized by executing a predetermined program by the CPU 311 in FIG.
- a signal sequence generation unit 341 and a signal sequence selection unit 342 are realized.
- the signal sequence generation unit 341 generates a signal sequence that is a candidate for GCS a, b and outputs the signal sequence to the signal sequence selection unit 342.
- the signal sequence selection unit 342 selects predetermined GCSs a and b from the signal sequence generated by the signal sequence generation unit 341. GCS a, b selected by the signal sequence selection unit 342 is used for generation of a preamble.
- step S32 the signal sequence selection unit 342 selects the maximum absolute value of the side lobe level of the cross-correlation between the sequence [a a -a] and the sequence [a -a] from the GCS generated in step S31. Select the GCS that minimizes.
- the cross-correlation between the sequence [a a -a] and the sequence [a -a] is calculated here. Used. Since the maximum absolute value of the side lobe level in the IEEE26802.15.3c preamble is 26 and the maximum absolute value of the side lobe level in the IEEE 802.11ad preamble is 38, the sidelobe level is smaller than any of these values. A GCS with a maximum absolute value of 25 or less may be selected.
- step S33 the signal sequence selection unit 342 selects, from the GCSs selected in step S32, a GCS in which the code-word digital sum (CDS) of the sequence a after ⁇ / 2-BPSK modulation is 0.
- CDS code-word digital sum
- step S34 the signal sequence selection unit 342 selects a GCS in which the CDS of the sequence a is 0 from the GCSs selected in step S33.
- GCS a, b described with reference to FIG. 16 is determined as described above. By using GCS a and b determined in this way, the side lobe level can be reduced.
- the program to be installed is provided by being recorded on a removable medium 321 shown in FIG. 27 made of an optical disk (CD-ROM (Compact Disc-Read Only Memory), DVD (Digital Versatile Disc), etc.), semiconductor memory, or the like. Further, it may be provided via a wired or wireless transmission medium such as a local area network, the Internet, or digital broadcasting.
- the program can be installed in advance in the ROM 312 or the storage unit 318.
- the program executed by the computer may be a program that is processed in time series in the order described in this specification, or in parallel or at a necessary timing such as when a call is made. It may be a program for processing.
- the system means a set of a plurality of components (devices, modules (parts), etc.), and it does not matter whether all the components are in the same housing. Accordingly, a plurality of devices housed in separate housings and connected via a network and a single device housing a plurality of modules in one housing are all systems. .
- Embodiments of the present technology are not limited to the above-described embodiments, and various modifications can be made without departing from the gist of the present technology.
- Each step described in the above flowchart can be executed by one device or can be shared by a plurality of devices.
- the plurality of processes included in the one step can be executed by being shared by a plurality of apparatuses in addition to being executed by one apparatus.
- a generator that generates a preamble including a signal sequence in which the maximum absolute value of the side lobe level of the cross-correlation with [d -d] is 25 or less;
- a transmission apparatus comprising: a transmission unit that transmits data to be transmitted in units of frames to which the preamble is added.
- the generation unit generates the preamble including the sequence d in which code-word digital sum (CDS) is 0 and CDS after ⁇ / 2-shift BPSK modulation is 0. (1) or ( 2) The transmission apparatus described in 2).
- the transmission apparatus according to any one of (1) to (3), wherein the bit length of the sequence d is 128.
- the sequence d has [-1, -1, -1, +1, +1, -1, -1] as weight vectors and [8, 4, 16, 2, 32, 1, 64] as delay vectors.
- the transmission device according to any one of (1) to (4), wherein the transmission device is a sequence obtained by applying to a generation formula. (6) Including a sequence [dd...
- a transmission method including a step of transmitting data to be transmitted in units of frames to which the preamble is added. (7) Including a sequence [dd... D -d] in which the inversion sequence of the sequence d is followed by the repetition of the sequence d which is one of the sequences a and b which are Golay complementary sequences.
- a program that causes a computer to execute processing including a step of transmitting data to be transmitted in units of frames to which the preamble is added.
- a transmission apparatus comprising: a transmission unit that transmits data to be transmitted in units of frames to which the preamble is added.
- the generator is [-A b a b a -b a b -a b a b] which is the first sequence including the first basic sequence; [A -b a b -a b a b a -b a b] which is a second sequence including the second basic sequence, [-A -b a -b a b a -b -a -b a -b], which is a third sequence including the third basic sequence, [A b a -b -a -b a -b a b a -b], which is the fourth sequence including the fourth basic sequence, An inverted series of the first to fourth series, A reverse sequence of the first to fourth sequences, The transmission apparatus according to (8), wherein the preamble including the signal estimation sequence of any one of the reverse sequences of the inverted sequences of the first to fourth sequences in a channel estimation sequence is generated.
- the generation unit generates the preamble including the sequences a and b whose code-word digital sum (CDS) is 0 and whose CDS after ⁇ / 2-shift BPSK modulation is 0. (8) Or the transmission apparatus as described in (9). (11) The transmission device according to any one of (8) to (10), wherein the bit lengths of the sequences a and b are 128.
- a receiving unit that receives a transmission signal of data in units of frames to which a preamble including a signal sequence having a maximum absolute value of a side lobe level of cross-correlation with [d-d] is 25 or less;
- a demodulator for demodulating the received signal;
- a receiving apparatus comprising: a synchronization unit that obtains a cross-correlation between a received signal sequence obtained by the demodulation process and a sequence [d-d] and performs frame synchronization based on threshold detection or maximum value detection of a cross-correlation value.
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Abstract
Description
1.プリンアンブルの例
2.IEEE 802.15.3c,IEEE 802.11adについて
3.本技術を適用したプリアンブルの考え方
4.伝送システム
5.本技術を適用したプリアンブル
6.各装置の構成と動作
7.GCS a,bの決定方法について
8.その他
図1は、フレームの構成例を示す図である。
<2-1.プリアンブル構成>
本技術を適用したプリアンブルを説明する前に、IEEE 802.15.3cとIEEE 802.11adのプリアンブルについて説明する。IEEE 802.15.3c,IEEE 802.11adにおいては、図2に示すようなプリアンブル構成が採用される。IEEE 802.15.3cとIEEE 802.11adについては、それぞれ非特許文献1,2に記載されている。
図5は、以上のようなプリアンブルに基づいてフレーム同期を行うフレーム同期装置の構成例を示す図である。
ここで、GCSの定義と生成方法の例について説明する。GCSの定義については非特許文献4に記載されており、GCSの生成方法については非特許文献5に記載されている。
次に、プリアンブルに含まれるチャネル推定用信号系列Cを用いたチャネル推定について説明する。チャネル推定については例えば非特許文献6に記載されている。
上述したように、同期性能の向上のためにはサイドローブのレベルが出来るだけ小さいことが望ましい。また、チャネル推定性能の向上のためにはより長いZCC区間を得られることが望ましい。
(1)[-a b a b a -b a b -a b a b]
(2)[a -b a b -a b a b a -b a b]
(3)[-a -b a -b a b a -b -a -b a -b]
(4)[a b a -b -a -b a -b a b a -b]
(6)[-a b -a -b a -b -a -b -a b -a -b]
(7)[a b -a b -a -b -a b a b -a b]
(8)[-a -b -a b a b -a b -a -b -a b]
(10)[b a -b a b a b -a b a -b a]
(11)[-b a -b -a -b a b a -b a -b -a]
(12)[-b a b a -b a -b -a -b a b a]
(13)[-b -a -b a -b -a b -a -b -a -b a]
(14)[-b -a b -a -b -a -b a -b -a b -a]
(15)[b -a b a b -a -b -a b -a b a]
(16)[b -a -b -a b -a b a b -a -b -a]
図13は、本技術の一実施形態に係る伝送システムの構成例を示す図である。
<5-1.プリアンブル構成>
図14は、本技術を適用したプリアンブルの構成例を示す図である。以下、適宜、本技術を適用したプリアンブルを新規プリアンブルという。
図16は、新規プリアンブルを構成する系列長128のGCS a,bの例を示す図である。
+1 -1 +1 -1 -1 +1 -1 +1 -1 +1 -1 +1 -1 +1 -1 +1
-1 +1 +1 -1 -1 +1 +1 -1 +1 -1 -1 +1 -1 +1 +1 -1
+1 +1 -1 -1 -1 -1 +1 +1 -1 -1 +1 +1 -1 -1 +1 +1
-1 -1 -1 -1 -1 -1 -1 -1 +1 +1 +1 +1 -1 -1 -1 -1
-1 -1 -1 -1 +1 +1 +1 +1 +1 +1 +1 +1 +1 +1 +1 +1
+1 +1 -1 -1 +1 +1 -1 -1 -1 -1 +1 +1 +1 +1 -1 -1
-1 +1 +1 -1 +1 -1 -1 +1 +1 -1 -1 +1 +1 -1 -1 +1
+1 -1 +1 -1 +1 -1 +1 -1 -1 +1 -1 +1 +1 -1 +1 -1
+1 -1 +1 -1 -1 +1 -1 +1 -1 +1 -1 +1 -1 +1 -1 +1
-1 +1 +1 -1 -1 +1 +1 -1 +1 -1 -1 +1 -1 +1 +1 -1
+1 +1 -1 -1 -1 -1 +1 +1 -1 -1 +1 +1 -1 -1 +1 +1
-1 -1 -1 -1 -1 -1 -1 -1 +1 +1 +1 +1 -1 -1 -1 -1
+1 +1 +1 +1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1
-1 -1 +1 +1 -1 -1 +1 +1 +1 +1 -1 -1 -1 -1 +1 +1
+1 -1 -1 +1 -1 +1 +1 -1 -1 +1 +1 -1 -1 +1 +1 -1
-1 +1 -1 +1 -1 +1 -1 +1 +1 -1 +1 -1 -1 +1 -1 +1
<6-1.各装置の構成>
次に、図13の伝送システムを構成する送信装置1と受信装置2の構成について説明する。
ここで、図25のフローチャートを参照して、送信装置1の送信処理について説明する。
ここで、GCS a,bの決定方法について説明する。
<8-1.プログラムについて>
上述した一連の処理は、ハードウェアにより実行することもできるし、ソフトウェアにより実行することもできる。一連の処理をソフトウェアにより実行する場合には、そのソフトウェアを構成するプログラムが、専用のハードウェアに組み込まれているコンピュータ、または、汎用のパーソナルコンピュータなどにインストールされる。
本技術は、以下のような構成をとることもできる。
Golayコンプリメンタリ系列である系列a,bのいずれか一方である系列dの繰り返しの後に前記系列dの反転系列が続く系列[d d ・・・ d -d]を含み、系列[d d -d]と系列[d -d]との相互相関のサイドローブレベルの絶対値の最大値が25以下である信号系列を含むプリアンブルを生成する生成部と、
送信対象のデータを、前記プリアンブルを付加したフレーム単位で送信する送信部と
を備える送信装置。
(2)
前記生成部は、サイドローブレベルの絶対値の最大値が最小となる前記系列dを含む前記プリアンブルを生成する
前記(1)に記載の送信装置。
(3)
前記生成部は、code-word digital sum(CDS)が0であり、かつ、π/2-shift BPSK変調後のCDSが0である前記系列dを含む前記プリアンブルを生成する
前記(1)または(2)に記載の送信装置。
(4)
前記系列dのビット長が128である
前記(1)乃至(3)のいずれかに記載の送信装置。
(5)
前記系列dは、重みベクトルとして[-1,-1,-1,+1,+1,-1,-1]を、遅延ベクトルとして[8,4,16,2,32,1,64]を生成式に適用して求められた系列である
前記(1)乃至(4)のいずれかに記載の送信装置。
(6)
Golayコンプリメンタリ系列である系列a,bのいずれか一方である系列dの繰り返しの後に前記系列dの反転系列が続く系列[d d ・・・ d -d]を含み、系列[d d -d]と系列[d -d]との相互相関のサイドローブレベルの絶対値の最大値が25以下である信号系列を含むプリアンブルを生成し、
送信対象のデータを、前記プリアンブルを付加したフレーム単位で送信する
ステップを含む送信方法。
(7)
Golayコンプリメンタリ系列である系列a,bのいずれか一方である系列dの繰り返しの後に前記系列dの反転系列が続く系列[d d ・・・ d -d]を含み、系列[d d -d]と系列[d -d]との相互相関のサイドローブレベルの絶対値の最大値が25以下である信号系列を含むプリアンブルを生成し、
送信対象のデータを、前記プリアンブルを付加したフレーム単位で送信する
ステップを含む処理をコンピュータに実行させるプログラム。
(8)
Golayコンプリメンタリ系列である系列a,b、および、前記系列a,bの反転系列である系列-a,-bの組合せからなり、
第1の基礎系列である[a b a -b a b -a b]、
第2の基礎系列である[a b -a b a b a -b]、
第3の基礎系列である[a -b a b a -b -a -b]、
第4の基礎系列である[a -b -a -b a -b a b]、
前記第1乃至第4の基礎系列の反転系列、
前記第1乃至第4の基礎系列の逆順系列、
および、前記第1乃至第4の基礎系列の反転系列の逆順系列
のうちのいずれかの信号系列をチャネル推定系列に含むプリアンブルを生成する生成部と、
送信対象のデータを、前記プリアンブルを付加したフレーム単位で送信する送信部と
を備える送信装置。
(9)
前記生成部は、
前記第1の基礎系列を含む第1の系列である[-a b a b a -b a b -a b a b]、
前記第2の基礎系列を含む第2の系列である[a -b a b -a b a b a -b a b]、
前記第3の基礎系列を含む第3の系列である[-a -b a -b a b a -b -a -b a -b]、
前記第4の基礎系列を含む第4の系列である[a b a -b -a -b a -b a b a -b]、
前記第1乃至第4の系列の反転系列、
前記第1乃至第4の系列の逆順系列、
および、前記第1乃至第4の系列の反転系列の逆順系列
のうちのいずれかの信号系列をチャネル推定系列に含む前記プリアンブルを生成する
前記(8)に記載の送信装置。
(10)
前記生成部は、code-word digital sum(CDS)が0であり、かつ、π/2-shift BPSK変調後のCDSが0である前記系列a,bを含む前記プリアンブルを生成する
前記(8)または(9)に記載の送信装置。
(11)
前記系列a,bのビット長が128である
前記(8)乃至(10)のいずれかに記載の送信装置。
(12)
Golayコンプリメンタリ系列である系列a,b、および、前記系列a,bの反転系列である系列-a,-bの組合せからなり、
第1の基礎系列である[a b a -b a b -a b]、
第2の基礎系列である[a b -a b a b a -b]、
第3の基礎系列である[a -b a b a -b -a -b]、
第4の基礎系列である[a -b -a -b a -b a b]、
前記第1乃至第4の基礎系列の反転系列、
前記第1乃至第4の基礎系列の逆順系列、
および、前記第1乃至第4の基礎系列の反転系列の逆順系列
のうちのいずれかの信号系列をチャネル推定系列に含むプリアンブルを生成し、
送信対象のデータを、前記プリアンブルを付加したフレーム単位で送信する
ステップを含む送信方法。
(13)
Golayコンプリメンタリ系列である系列a,b、および、前記系列a,bの反転系列である系列-a,-bの組合せからなり、
第1の基礎系列である[a b a -b a b -a b]、
第2の基礎系列である[a b -a b a b a -b]、
第3の基礎系列である[a -b a b a -b -a -b]、
第4の基礎系列である[a -b -a -b a -b a b]、
前記第1乃至第4の基礎系列の反転系列、
前記第1乃至第4の基礎系列の逆順系列、
および、前記第1乃至第4の基礎系列の反転系列の逆順系列
のうちのいずれかの信号系列をチャネル推定系列に含むプリアンブルを生成し、
送信対象のデータを、前記プリアンブルを付加したフレーム単位で送信する
ステップを含む処理をコンピュータに実行させるプログラム。
(14)
Golayコンプリメンタリ系列である系列a,bのいずれか一方である系列dの繰り返しの後に前記系列dの反転系列が続く系列[d d ・・・ d -d]を含み、系列[d d -d]と系列[d -d]との相互相関のサイドローブレベルの絶対値の最大値が25以下である信号系列を含むプリアンブルを付加したフレーム単位のデータの送信信号を受信する受信部と、
受信信号に対して復調処理を施す復調部と、
前記復調処理により得られた受信信号系列と、系列[d -d]との相互相関を求め、相互相関値の閾値検出または最大値検出に基づいてフレーム同期を行う同期部と
を備える受信装置。
(15)
Golayコンプリメンタリ系列である系列a,bのいずれか一方である系列dの繰り返しの後に前記系列dの反転系列が続く系列[d d ・・・ d -d]を含み、系列[d d -d]と系列[d -d]との相互相関のサイドローブレベルの絶対値の最大値が25以下である信号系列を含むプリアンブルを付加したフレーム単位のデータの送信信号を受信し、
受信信号に対して復調処理を施し、
前記復調処理により得られた受信信号系列と、系列[d -d]との相互相関を求め、相互相関値の閾値検出または最大値検出に基づいてフレーム同期を行う
ステップを含む受信方法。
(16)
Golayコンプリメンタリ系列である系列a,bのいずれか一方である系列dの繰り返しの後に前記系列dの反転系列が続く系列[d d ・・・ d -d]を含み、系列[d d -d]と系列[d -d]との相互相関のサイドローブレベルの絶対値の最大値が25以下である信号系列を含むプリアンブルを付加したフレーム単位のデータの送信信号を受信し、
受信信号に対して復調処理を施し、
前記復調処理により得られた受信信号系列と、系列[d -d]との相互相関を求め、相互相関値の閾値検出または最大値検出に基づいてフレーム同期を行う
ステップを含む処理をコンピュータに実行させるプログラム。
(17)
Golayコンプリメンタリ系列である系列a,b、および、前記系列a,bの反転系列である系列-a,-bの組合せからなり、
第1の基礎系列である[a b a -b a b -a b]、
第2の基礎系列である[a b -a b a b a -b]、
第3の基礎系列である[a -b a b a -b -a -b]、
第4の基礎系列である[a -b -a -b a -b a b]、
前記第1乃至第4の基礎系列の反転系列、
前記第1乃至第4の基礎系列の逆順系列、
および、前記第1乃至第4の基礎系列の反転系列の逆順系列
のうちのいずれかの信号系列をチャネル推定系列に含むプリアンブルを付加したフレーム単位のデータの送信信号を受信する受信部と、
受信信号に対して復調処理を施す復調部と、
前記復調処理により得られた受信信号系列に基づいてフレーム同期を行う同期部と、
前記受信信号系列と、前記チャネル推定系列に含まれる前記信号系列の前半の4つの系列との第1の相互相関を求めるとともに、前記受信信号系列と、前記信号系列の後半の4つの系列との第2の相互相関を求め、前記第1の相互相関と前記第2の相互相関に基づいてチャネル推定を行う等化部と
を備える受信装置。
(18)
Golayコンプリメンタリ系列である系列a,b、および、前記系列a,bの反転系列である系列-a,-bの組合せからなり、
第1の基礎系列である[a b a -b a b -a b]、
第2の基礎系列である[a b -a b a b a -b]、
第3の基礎系列である[a -b a b a -b -a -b]、
第4の基礎系列である[a -b -a -b a -b a b]、
前記第1乃至第4の基礎系列の反転系列、
前記第1乃至第4の基礎系列の逆順系列、
および、前記第1乃至第4の基礎系列の反転系列の逆順系列
のうちのいずれかの信号系列をチャネル推定系列に含むプリアンブルを付加したフレーム単位のデータの送信信号を受信し、
受信信号に対して復調処理を施し、
前記復調処理により得られた受信信号系列に基づいてフレーム同期を行い、
前記受信信号系列と、前記チャネル推定系列に含まれる前記信号系列の前半の4つの系列との第1の相互相関を求めるとともに、前記受信信号系列と、前記信号系列の後半の4つの系列との第2の相互相関を求め、
前記第1の相互相関と前記第2の相互相関に基づいてチャネル推定を行う
ステップを含む受信方法。
(19)
Golayコンプリメンタリ系列である系列a,b、および、前記系列a,bの反転系列である系列-a,-bの組合せからなり、
第1の基礎系列である[a b a -b a b -a b]、
第2の基礎系列である[a b -a b a b a -b]、
第3の基礎系列である[a -b a b a -b -a -b]、
第4の基礎系列である[a -b -a -b a -b a b]、
前記第1乃至第4の基礎系列の反転系列、
前記第1乃至第4の基礎系列の逆順系列、
および、前記第1乃至第4の基礎系列の反転系列の逆順系列
のうちのいずれかの信号系列をチャネル推定系列に含むプリアンブルを付加したフレーム単位のデータの送信信号を受信し、
受信信号に対して復調処理を施し、
前記復調処理により得られた受信信号系列に基づいてフレーム同期を行い、
前記受信信号系列と、前記チャネル推定系列に含まれる前記信号系列の前半の4つの系列との第1の相互相関を求めるとともに、前記受信信号系列と、前記信号系列の後半の4つの系列との第2の相互相関を求め、
前記第1の相互相関と前記第2の相互相関に基づいてチャネル推定を行う
ステップを含む処理をコンピュータに実行させるプログラム。
Claims (19)
- Golayコンプリメンタリ系列である系列a,bのいずれか一方である系列dの繰り返しの後に前記系列dの反転系列が続く系列[d d ・・・ d -d]を含み、系列[d d -d]と系列[d -d]との相互相関のサイドローブレベルの絶対値の最大値が25以下である信号系列を含むプリアンブルを生成する生成部と、
送信対象のデータを、前記プリアンブルを付加したフレーム単位で送信する送信部と
を備える送信装置。 - 前記生成部は、サイドローブレベルの絶対値の最大値が最小となる前記系列dを含む前記プリアンブルを生成する
請求項1に記載の送信装置。 - 前記生成部は、code-word digital sum(CDS)が0であり、かつ、π/2-shift BPSK変調後のCDSが0である前記系列dを含む前記プリアンブルを生成する
請求項1に記載の送信装置。 - 前記系列dのビット長が128である
請求項1に記載の送信装置。 - 前記系列dは、重みベクトルとして[-1,-1,-1,+1,+1,-1,-1]を、遅延ベクトルとして[8,4,16,2,32,1,64]を生成式に適用して求められた系列である
請求項1に記載の送信装置。 - Golayコンプリメンタリ系列である系列a,bのいずれか一方である系列dの繰り返しの後に前記系列dの反転系列が続く系列[d d ・・・ d -d]を含み、系列[d d -d]と系列[d -d]との相互相関のサイドローブレベルの絶対値の最大値が25以下である信号系列を含むプリアンブルを生成し、
送信対象のデータを、前記プリアンブルを付加したフレーム単位で送信する
ステップを含む送信方法。 - Golayコンプリメンタリ系列である系列a,bのいずれか一方である系列dの繰り返しの後に前記系列dの反転系列が続く系列[d d ・・・ d -d]を含み、系列[d d -d]と系列[d -d]との相互相関のサイドローブレベルの絶対値の最大値が25以下である信号系列を含むプリアンブルを生成し、
送信対象のデータを、前記プリアンブルを付加したフレーム単位で送信する
ステップを含む処理をコンピュータに実行させるプログラム。 - Golayコンプリメンタリ系列である系列a,b、および、前記系列a,bの反転系列である系列-a,-bの組合せからなり、
第1の基礎系列である[a b a -b a b -a b]、
第2の基礎系列である[a b -a b a b a -b]、
第3の基礎系列である[a -b a b a -b -a -b]、
第4の基礎系列である[a -b -a -b a -b a b]、
前記第1乃至第4の基礎系列の反転系列、
前記第1乃至第4の基礎系列の逆順系列、
および、前記第1乃至第4の基礎系列の反転系列の逆順系列
のうちのいずれかの信号系列をチャネル推定系列に含むプリアンブルを生成する生成部と、
送信対象のデータを、前記プリアンブルを付加したフレーム単位で送信する送信部と
を備える送信装置。 - 前記生成部は、
前記第1の基礎系列を含む第1の系列である[-a b a b a -b a b -a b a b]、
前記第2の基礎系列を含む第2の系列である[a -b a b -a b a b a -b a b]、
前記第3の基礎系列を含む第3の系列である[-a -b a -b a b a -b -a -b a -b]、
前記第4の基礎系列を含む第4の系列である[a b a -b -a -b a -b a b a -b]、
前記第1乃至第4の系列の反転系列、
前記第1乃至第4の系列の逆順系列、
および、前記第1乃至第4の系列の反転系列の逆順系列
のうちのいずれかの信号系列をチャネル推定系列に含む前記プリアンブルを生成する
請求項8に記載の送信装置。 - 前記生成部は、code-word digital sum(CDS)が0であり、かつ、π/2-shift BPSK変調後のCDSが0である前記系列a,bを含む前記プリアンブルを生成する
請求項8に記載の送信装置。 - 前記系列a,bのビット長が128である
請求項8に記載の送信装置。 - Golayコンプリメンタリ系列である系列a,b、および、前記系列a,bの反転系列である系列-a,-bの組合せからなり、
第1の基礎系列である[a b a -b a b -a b]、
第2の基礎系列である[a b -a b a b a -b]、
第3の基礎系列である[a -b a b a -b -a -b]、
第4の基礎系列である[a -b -a -b a -b a b]、
前記第1乃至第4の基礎系列の反転系列、
前記第1乃至第4の基礎系列の逆順系列、
および、前記第1乃至第4の基礎系列の反転系列の逆順系列
のうちのいずれかの信号系列をチャネル推定系列に含むプリアンブルを生成し、
送信対象のデータを、前記プリアンブルを付加したフレーム単位で送信する
ステップを含む送信方法。 - Golayコンプリメンタリ系列である系列a,b、および、前記系列a,bの反転系列である系列-a,-bの組合せからなり、
第1の基礎系列である[a b a -b a b -a b]、
第2の基礎系列である[a b -a b a b a -b]、
第3の基礎系列である[a -b a b a -b -a -b]、
第4の基礎系列である[a -b -a -b a -b a b]、
前記第1乃至第4の基礎系列の反転系列、
前記第1乃至第4の基礎系列の逆順系列、
および、前記第1乃至第4の基礎系列の反転系列の逆順系列
のうちのいずれかの信号系列をチャネル推定系列に含むプリアンブルを生成し、
送信対象のデータを、前記プリアンブルを付加したフレーム単位で送信する
ステップを含む処理をコンピュータに実行させるプログラム。 - Golayコンプリメンタリ系列である系列a,bのいずれか一方である系列dの繰り返しの後に前記系列dの反転系列が続く系列[d d ・・・ d -d]を含み、系列[d d -d]と系列[d -d]との相互相関のサイドローブレベルの絶対値の最大値が25以下である信号系列を含むプリアンブルを付加したフレーム単位のデータの送信信号を受信する受信部と、
受信信号に対して復調処理を施す復調部と、
前記復調処理により得られた受信信号系列と、系列[d -d]との相互相関を求め、相互相関値の閾値検出または最大値検出に基づいてフレーム同期を行う同期部と
を備える受信装置。 - Golayコンプリメンタリ系列である系列a,bのいずれか一方である系列dの繰り返しの後に前記系列dの反転系列が続く系列[d d ・・・ d -d]を含み、系列[d d -d]と系列[d -d]との相互相関のサイドローブレベルの絶対値の最大値が25以下である信号系列を含むプリアンブルを付加したフレーム単位のデータの送信信号を受信し、
受信信号に対して復調処理を施し、
前記復調処理により得られた受信信号系列と、系列[d -d]との相互相関を求め、相互相関値の閾値検出または最大値検出に基づいてフレーム同期を行う
ステップを含む受信方法。 - Golayコンプリメンタリ系列である系列a,bのいずれか一方である系列dの繰り返しの後に前記系列dの反転系列が続く系列[d d ・・・ d -d]を含み、系列[d d -d]と系列[d -d]との相互相関のサイドローブレベルの絶対値の最大値が25以下である信号系列を含むプリアンブルを付加したフレーム単位のデータの送信信号を受信し、
受信信号に対して復調処理を施し、
前記復調処理により得られた受信信号系列と、系列[d -d]との相互相関を求め、相互相関値の閾値検出または最大値検出に基づいてフレーム同期を行う
ステップを含む処理をコンピュータに実行させるプログラム。 - Golayコンプリメンタリ系列である系列a,b、および、前記系列a,bの反転系列である系列-a,-bの組合せからなり、
第1の基礎系列である[a b a -b a b -a b]、
第2の基礎系列である[a b -a b a b a -b]、
第3の基礎系列である[a -b a b a -b -a -b]、
第4の基礎系列である[a -b -a -b a -b a b]、
前記第1乃至第4の基礎系列の反転系列、
前記第1乃至第4の基礎系列の逆順系列、
および、前記第1乃至第4の基礎系列の反転系列の逆順系列
のうちのいずれかの信号系列をチャネル推定系列に含むプリアンブルを付加したフレーム単位のデータの送信信号を受信する受信部と、
受信信号に対して復調処理を施す復調部と、
前記復調処理により得られた受信信号系列に基づいてフレーム同期を行う同期部と、
前記受信信号系列と、前記チャネル推定系列に含まれる前記信号系列の前半の4つの系列との第1の相互相関を求めるとともに、前記受信信号系列と、前記信号系列の後半の4つの系列との第2の相互相関を求め、前記第1の相互相関と前記第2の相互相関に基づいてチャネル推定を行う等化部と
を備える受信装置。 - Golayコンプリメンタリ系列である系列a,b、および、前記系列a,bの反転系列である系列-a,-bの組合せからなり、
第1の基礎系列である[a b a -b a b -a b]、
第2の基礎系列である[a b -a b a b a -b]、
第3の基礎系列である[a -b a b a -b -a -b]、
第4の基礎系列である[a -b -a -b a -b a b]、
前記第1乃至第4の基礎系列の反転系列、
前記第1乃至第4の基礎系列の逆順系列、
および、前記第1乃至第4の基礎系列の反転系列の逆順系列
のうちのいずれかの信号系列をチャネル推定系列に含むプリアンブルを付加したフレーム単位のデータの送信信号を受信し、
受信信号に対して復調処理を施し、
前記復調処理により得られた受信信号系列に基づいてフレーム同期を行い、
前記受信信号系列と、前記チャネル推定系列に含まれる前記信号系列の前半の4つの系列との第1の相互相関を求めるとともに、前記受信信号系列と、前記信号系列の後半の4つの系列との第2の相互相関を求め、
前記第1の相互相関と前記第2の相互相関に基づいてチャネル推定を行う
ステップを含む受信方法。 - Golayコンプリメンタリ系列である系列a,b、および、前記系列a,bの反転系列である系列-a,-bの組合せからなり、
第1の基礎系列である[a b a -b a b -a b]、
第2の基礎系列である[a b -a b a b a -b]、
第3の基礎系列である[a -b a b a -b -a -b]、
第4の基礎系列である[a -b -a -b a -b a b]、
前記第1乃至第4の基礎系列の反転系列、
前記第1乃至第4の基礎系列の逆順系列、
および、前記第1乃至第4の基礎系列の反転系列の逆順系列
のうちのいずれかの信号系列をチャネル推定系列に含むプリアンブルを付加したフレーム単位のデータの送信信号を受信し、
受信信号に対して復調処理を施し、
前記復調処理により得られた受信信号系列に基づいてフレーム同期を行い、
前記受信信号系列と、前記チャネル推定系列に含まれる前記信号系列の前半の4つの系列との第1の相互相関を求めるとともに、前記受信信号系列と、前記信号系列の後半の4つの系列との第2の相互相関を求め、
前記第1の相互相関と前記第2の相互相関に基づいてチャネル推定を行う
ステップを含む処理をコンピュータに実行させるプログラム。
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN201680050817.7A CN107925645B (zh) | 2015-09-10 | 2016-08-26 | 发送设备、发送方法、接收设备、接收方法和存储介质 |
US15/753,981 US10554318B2 (en) | 2015-09-10 | 2016-08-26 | Transmission device, transmission method, reception device, reception method, and program |
JP2017539107A JP6812352B2 (ja) | 2015-09-10 | 2016-08-26 | 送信装置、送信方法、受信装置、受信方法、およびプログラム |
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CN115967413A (zh) * | 2021-10-13 | 2023-04-14 | 华为技术有限公司 | 一种传输物理层协议数据单元的方法和装置 |
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US8830917B1 (en) * | 2009-02-04 | 2014-09-09 | Marvell International Ltd. | Short preamble in a physical layer data unit |
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CN107925645A (zh) | 2018-04-17 |
CN107925645B (zh) | 2020-12-22 |
US20180241490A1 (en) | 2018-08-23 |
JP6812352B2 (ja) | 2021-01-13 |
US10554318B2 (en) | 2020-02-04 |
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