# US 2017/0254879 A1 · Orthogonal separation device and orthogonal separation

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- Number: US 2017/0254879 A1
- Document ID: US20170254879A1
- Status: Published application
- Kind: A1
- Application number: 15/506,780
- Filed: 2015-08-26
- Published: 2017-09-07
- Earliest claimed: 2014-08-28
- Assignees: Japan Radio Co., Ltd.
- Applicants: Japan Radio Co., Ltd.
- Inventors: Yukinobu TOKIEDA, I; Keiko MATSUMOTO
- Web page: https://patentgrep.com/patent/US20170254879A1

## CPC

- G01S 7/352: {Receivers}
- G01S 7/0233: {Avoidance by phase multiplex}
- G01S 13/325: {using transmission of coded signals, e.g. P.S.K. signals}
- G01S 13/343: {using sawtooth modulation}
- G01S 7/356: {involving particularities of FFT processing}
- G01S 13/42: Simultaneous measurement of distance and other co-ordinates (indirect measurement G01S13/46)
- G01S: RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES

## Abstract

An orthogonal separation device of the invention includes a demodulator that performs a demodulation process corresponding to each of a plural number N of antennas for each of a plural number P (=M×N) of pulse waves (R11 to R1M), . . . , (RN1 to RNM) which arrives at the plural number N of antennas by transmitting, at the same time, a plural number M of pulse waves having phases φ1 to φM set as different arrays of known discrete values and that generates a plural number P of demodulated signals (R′11 to (R′1M), . . . (R′N1 to R′NM), and includes a phase adjuster that adjusts difference among the phases of a plural number P of demodulated signals (R′11 to R′1M), . . . , (R′11 to R′NM) according to the arrays of known discrete values and generates a plural number P of in-phase signals (r11 to r1M), . . . , (rN1 to rNM).

## Claims

### Claim 1

An orthogonal separation device comprising:
a demodulator that performs a demodulation process corresponding to each of a plural number N of antennas for each of a plural number P (=M×N) of pulse waves (R11 to R1M), . . . , (RN1 to RNM) which arrives at the plural number N of antennas by transmitting, at the same time, a plural number M of pulse waves having phases φ1 to φM set as different arrays of known discrete values and that generates a plural number P of demodulated signals (R′11 to R′1M), . . . , (R′N1 to R′NM); and
a phase adjuster that adjusts difference among the phases of a plural number P of demodulated signals (R′11 to R′1M), . . . , (R′N1 to R′NM) according to the arrays of known discrete values and generates a plural number P of in-phase signals (r11 to r1M), . . . , (rN1 to rNM).

### Claim 2 (depends on 1)

The orthogonal separation device according to claim 1, further comprising:
an integrator that integrates each combination of the in-phase signals (r11 to rN1), . . . , (r1M to rNM), of the plural number P of in-phase signals (r11 to r1M), . . . , (rN1 to rNM), corresponding to each pulse wave arriving at the plural number N of antennas and acquires received waves S1 to SN corresponding to the respective plural number N of antennas.

### Claim 3

An orthogonal separation method comprising:
performing a demodulation process corresponding to each of a plural number N of antennas for each of a plural number P (=M×N) of pulse waves (R11 to R1M), . . . , (RN1 to RNM) which arrives at the plural number N of antennas by transmitting, at the same time, a plural number M of pulse waves having phases φ1 to φM set as different arrays of known discrete values, and generating a plural number P of demodulated signals (R′11 to R′1M), . . . , (R′N1 to R′NM); and
adjusting difference among the phases of a plural number P of demodulated signals (R′11 to R′1M), . . . , (R′N1 to R′NM) according to the arrays of known discrete values and generating a plural number P of in-phase signals (r11 to r1M), . . . , (rN1 to rNM).

### Claim 4 (depends on 3)

The orthogonal separation method according to claim 3, further comprising:
integrating each combination of the in-phase signals (r11 to rN1), . . . , (r1M to rNM), of the plural number P of in-phase signals (r11 to r1M), . . . , (rN1 to rNM), corresponding to each pulse wave arriving at the plural number N of antennas, and acquiring received waves S1 to SN corresponding to the respective plural number N of antennas.