Method and device for transmitting pilot signal
First Claim
Patent Images
1. A method for transmitting a pilot signal, comprising:
- mapping the pilot signal to a set of even sub-carriers of a first and/or last orthogonal frequency division multiplex symbol to generate a frequency-domain pilot signal;
or mapping the pilot signal to a set of odd sub-carriers of the first and/or last orthogonal frequency division multiplex symbol to generate a frequency-domain pilot signal;
modulating the frequency-domain pilot signal in the time domain; and
transmitting the modulated pilot signal in the first and/or last orthogonal frequency division multiplex symbol of a sub-frame in which the pilot signal is transmitted;
wherein modulating the frequency-domain pilot signal in the time domain comprises;
performing frequency domain to time domain conversion on the frequency-domain pilot signal to generate a second time-domain signal, wherein the second time-domain signal has a length of one orthogonal frequency division multiplex symbol, and both a first half of the second time-domain signal and a second half of the second time-domain signal carry the pilot signal; and
intercepting a segment of continuous time-domain signal from the second time-domain signal to generate a first time-domain signal, wherein the first time-domain signal comprises the first half of the second time-domain signal or the second half of the second time-domain signal, the first time-domain signal is the modulated pilot signal, and the length of the first time-domain signal is less than the length of an orthogonal frequency division multiplex symbol for data transmission, and no less than half the length of data portion in the orthogonal frequency division multiplex symbol for data transmission.
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Abstract
Disclosed are a method and device for transmitting a pilot signal. The method therefor comprises: conducting OFDM modulation on a pilot signal; and sending the modulated pilot signal on the first and/or the last OFDM symbol of a subframe which transmits the pilot signal. In the technical solution provided in the embodiments of the present application, the pilot signal is transmitted on the first and/or the last OFDM symbol of the subframe, thereby not occupying an OFDM symbol for transmitting a data signal, so as to reduce the resource overhead of the pilot signal.
1 Citation
14 Claims
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1. A method for transmitting a pilot signal, comprising:
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mapping the pilot signal to a set of even sub-carriers of a first and/or last orthogonal frequency division multiplex symbol to generate a frequency-domain pilot signal;
or mapping the pilot signal to a set of odd sub-carriers of the first and/or last orthogonal frequency division multiplex symbol to generate a frequency-domain pilot signal;modulating the frequency-domain pilot signal in the time domain; and transmitting the modulated pilot signal in the first and/or last orthogonal frequency division multiplex symbol of a sub-frame in which the pilot signal is transmitted; wherein modulating the frequency-domain pilot signal in the time domain comprises; performing frequency domain to time domain conversion on the frequency-domain pilot signal to generate a second time-domain signal, wherein the second time-domain signal has a length of one orthogonal frequency division multiplex symbol, and both a first half of the second time-domain signal and a second half of the second time-domain signal carry the pilot signal; and intercepting a segment of continuous time-domain signal from the second time-domain signal to generate a first time-domain signal, wherein the first time-domain signal comprises the first half of the second time-domain signal or the second half of the second time-domain signal, the first time-domain signal is the modulated pilot signal, and the length of the first time-domain signal is less than the length of an orthogonal frequency division multiplex symbol for data transmission, and no less than half the length of data portion in the orthogonal frequency division multiplex symbol for data transmission. - View Dependent Claims (2, 3, 4)
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5. A method for receiving a pilot signal, the method comprising:
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receiving the modulated pilot signal in a first and/or last orthogonal frequency division multiplex symbol of a sub-frame in which the pilot signal is transmitted; performing time to frequency conversion on the modulated pilot signal to generate a frequency-domain pilot signal; and de-mapping the frequency-domain pilot signal, and obtaining the pilot signal from a set of even sub-carriers;
or de-mapping the frequency-domain pilot signal, and obtaining the pilot signal from a set of odd sub-carriers;wherein the modulated pilot signal is a channel response signal of a first half or a second half of a second time-domain signal, the second time-domain signal is obtained by a transmitter performing frequency domain to time domain conversion on the frequency-domain pilot signal, and the second time-domain signal has a length of one orthogonal frequency division multiplex symbol, both the first half of the second time-domain signal and the second half of the second time-domain signal carry the pilot signal; and wherein the length of the modulated pilot signal is less than the length of an orthogonal frequency division multiplex symbol for data transmission, and no less than half the length of data portion in the orthogonal frequency division multiplex symbol for data transmission; and
the length of the modulated pilot signal is the length in the time domain of the first and/or last orthogonal frequency division multiplex symbol in the sub-frame in which the pilot signal is transmitted. - View Dependent Claims (6, 7)
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8. A pilot signal transmitter, comprising:
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a transceiver, and at least one processor connected with the transceiver, wherein; the processor is configured to map the pilot signal to a set of even sub-carriers of a first and/or last orthogonal frequency division multiplex symbol to generate a frequency-domain pilot signal;
or map the pilot signal to a set of odd sub-carriers of the first and/or last orthogonal frequency division multiplex symbol to generate a frequency-domain pilot signal; and
modulate the frequency-domain pilot signal in the time domain; andthe transceiver is configured to transmit the modulated pilot signal in the first and/or last orthogonal frequency division multiplex symbol of a sub-frame in which the pilot signal is transmitted; wherein the processor configured to modulate the frequency-domain pilot signal in the time domain is configured to perform frequency domain to time domain conversion on the frequency-domain pilot signal to generate a second time-domain signal, wherein the second time-domain signal has a length of one orthogonal frequency division multiplex symbol, and both a first half of the second time-domain signal and a second half of the second time-domain signal carry the pilot signal; and
intercept a segment of continuous time-domain signal from the second time-domain signal to generate a first time-domain signal, wherein the first time-domain signal comprises the first half of the second time-domain signal or the second half of the second time-domain signal, the first time-domain signal is the modulated pilot signal, and the length of the first time-domain signal is less than the length of an orthogonal frequency division multiplex symbol for data transmission, and no less than half the length of data portion in the orthogonal frequency division multiplex symbol for data transmission. - View Dependent Claims (9, 10, 11)
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12. A pilot signal receiver, comprising:
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a transceiver, and at least one processor connected with the transceiver, wherein; the transceiver is configured to receive a modulated pilot signal in a first and/or last orthogonal frequency division multiplex symbol of a sub-frame in which the pilot signal is transmitted; and the processor is configured to perform time to frequency conversion on the modulated pilot signal to generate a frequency-domain pilot signal; and
de-map the frequency-domain pilot signal, and obtain the pilot signal from a set of even sub-carriers;
or de-mapping the frequency-domain pilot signal, and obtaining the pilot signal from a set of odd sub-carriers;wherein the modulated pilot signal is a channel response signal of a first half or a second half of a second time-domain signal, the second time-domain signal is obtained by a transmitter performing frequency domain to time domain conversion on the frequency-domain pilot signal, and the second time-domain signal has a length of one orthogonal frequency division multiplex symbol, both the first half of the second time-domain signal and the second half of the second time-domain signal carry the pilot signal; and wherein the length of the modulated pilot signal is less than the length of an orthogonal frequency division multiplex symbol for data transmission, and no less than half the length of data portion in the orthogonal frequency division multiplex symbol for data transmission; and
the length of the modulated pilot signal is the length in the time domain of the first and/or last orthogonal frequency division multiplex symbol in the sub-frame in which the pilot signal is transmitted. - View Dependent Claims (13, 14)
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Specification