WO2015149538A1 - Multi-channel signal receiving method and device, and storage medium - Google Patents

Abstract

Disclosed is a multi-channel signal receiving method. The method comprises: measuring, by a receiving end, a signal state of a multi-channel signal; and according to the signal state of the multi-channel signal, closing a receiving channel having a poor signal state, the signal state comprising a received power of each receiving antenna and/or a channel estimation power value of a transmission path of each received signal. Also disclosed at the same time are a multi-channel signal receiving device and a storage medium.

Description

Multi-channel signal receiving method, device and storage medium Technical field

The invention relates to a multi-channel multi-channel signal transmission technology, in particular to a multi-channel signal receiving method, device and storage medium.

Background technique

Multiple Input Multiple Output (MIMO) systems have been widely used in 3G CDMA systems and 4G OFDM systems; MIMO systems refer to data transmitted by base station transmitters through space-time coding or independent data streams through multiple transmit antennas. Transmit, transmit data to the receiving end; the receiving end adopts the same number of transmitting antennas as the transmitting transmitting antenna or exceeds the number of transmitting antennas, and performs multi-channel diversity receiving on the signal transmitted by the transmitting end of the base station.

Generalized MIMO systems can be divided into single-issue multi-receiving SIMO systems, multi-issue single-receiving systems MISO, and general-purpose multi-receive multi-reception MIMO systems. In SIMO systems, multi-reception generally uses diversity reception to improve the system's received signal-to-noise ratio. In the MISO system, the transmitting end generally adopts space-time coded diversity transmission mode, which can also improve the receiving signal-to-noise ratio. In the multi-transmitting and multi-receiving MIMO system, it can be an independent multi-transmitting channel and a diversity receiving mode, and can also adopt joint transmit diversity and reception. Diversity mode to improve reception performance.

A disadvantage of current MIMO systems is that reception processing is relatively complex, especially for large bandwidth communication systems.

Summary of the invention

In order to solve the existing technical problems, embodiments of the present invention provide a method, an apparatus, and a storage medium for receiving a multi-channel signal.

The technical solution of the embodiment of the present invention is implemented as follows:

An embodiment of the present invention provides a method for receiving a multi-channel signal, where the method includes:

The receiving end measures the signal state of the multi-channel signal, and closes the receiving channel of the signal state difference according to the signal state of the multi-channel signal; the signal state includes the receiving power of each receiving antenna and/or the channel estimated power value of the transmission path of each received signal. .

An embodiment of the present invention provides a multi-channel signal receiving apparatus, where the apparatus includes: a radio frequency receiving processor, an analog baseband processor, and a digital baseband processor;

The radio frequency receiving processor is configured to process the multi-channel signal into a multi-channel analog baseband signal and send the signal to the analog baseband processor;

The analog baseband processor is configured to process the multi-channel analog baseband signal into a multi-channel digital baseband signal and transmit the signal to a digital baseband processor;

The digital baseband processor is configured to measure a signal state of a digital baseband signal of each channel, and close a receiving channel of a signal state difference according to a signal state of the digital baseband signal of each channel;

The signal state includes a received power of each receiving antenna and/or a channel estimated power value of a transmission path of a digital baseband signal of each channel.

The embodiment of the invention further provides a computer storage medium, wherein a computer program for executing the above-mentioned multi-channel signal receiving method is stored.

Embodiments of the present invention provide a method, a device, and a storage medium for receiving a multi-channel signal. The receiving end measures a signal state of a multi-channel signal, and closes a receiving channel of a signal state difference according to a signal state of the multi-channel signal; the signal state includes The received power of each receiving antenna and/or the channel estimated power value of the transmission path of each received signal; thus, the present invention simplifies the processing at the receiving end, reduces the amount of computation at the receiving end, thereby reducing the complexity of reception and power consumption.

DRAWINGS

1 is a schematic structural diagram of a multi-channel signal transmission system in the prior art;

2 is a schematic flowchart of a method for receiving a multi-channel signal according to Embodiment 1 of the present invention;

3 is a schematic flowchart of a method for receiving a multi-channel signal according to Embodiment 2 of the present invention;

4 is a schematic flowchart of a method for receiving a multi-channel signal according to Embodiment 3 of the present invention;

FIG. 5 is a schematic flowchart of a method for receiving a multi-channel signal according to Embodiment 4 of the present invention;

FIG. 6 is a schematic structural diagram of a multi-channel signal receiving apparatus according to Embodiment 5 of the present invention; FIG.

FIG. 7 is a schematic structural diagram of a multi-channel signal receiving apparatus according to Embodiment 6 of the present invention; FIG.

FIG. 8 is a schematic structural diagram of a multi-channel signal receiving apparatus according to Embodiment 7 of the present invention; FIG.

FIG. 9 is a schematic structural diagram of a multi-channel signal receiving apparatus according to Embodiment 8 of the present invention; FIG.

FIG. 10 is a schematic structural diagram of a multi-channel signal receiving apparatus according to Embodiment 9 of the present invention; FIG.

FIG. 11 is a schematic structural diagram of a multi-channel signal receiving apparatus according to Embodiment 10 of the present invention.

In the figure: 1, baseband processor; 2, RF transmitter processor; 3, RF receiver processor; 4, analog baseband processor; 5, digital baseband processor; 6, RF switch; 501, multi-channel estimation processor; 502, channel noise reduction processor; 503, channel switch; 504, multi-channel signal detector; 505, frequency domain characteristics and speed estimation processor; 506, multi-channel power detector.

detailed description

In order to understand the present invention more clearly, this paper first introduces a method for receiving a multi-channel signal in the prior art, as shown in FIG. 1 , taking a multi-channel signal transmission of 2 transmissions and 2 receptions as an example, and the prior art The digital signal is processed by the baseband processor 1 of the transmitting end, and then sent to the RF transmitting processor 2, and two transmitting signals are formed by two transmitting antennas. On the downlink receiving, the receiving end is provided with two independent RF receiving processors. 3 and two independent analog baseband processors 4, on the RF receiving processor 3, perform band pass filtering, RF amplification, carrier demodulation and low pass filtering to form a low pass analog signal, and then an analog baseband processor 4 After performing anti-aliasing low-pass filtering and AD sampling, a digital baseband signal is formed, and the digital baseband signal is sent to the digital baseband processor 5 to perform signal reception and measurement; thus, regardless of the strength of the received signal transmitted from the base station side to the receiving end, the receiving Both ends receive and process, which increases the complexity of reception and increases the power consumption of the receiver.

In the embodiment of the present invention, the receiving end measures the signal state of the multi-channel signal, and closes the receiving channel of the signal state difference according to the signal state of the multi-channel signal; the signal state includes the receiving power of each receiving antenna and/or the transmission of each received signal. The estimated channel power value of the path.

The invention will be further described in detail below with reference to the drawings and specific embodiments.

Embodiment 1

An embodiment of the present invention implements a method for receiving a multi-channel signal, the method comprising: receiving, by a receiving end, a signal state of a multi-channel signal, and closing a receiving channel of a signal state difference according to a signal state of the multi-channel signal; the signal state including each receiving The received power of the antenna and/or the channel estimated power value of the transmission path of each received signal are as shown in FIG. 2, and the specific steps of the method are as follows:

Step 201: The receiving end measures a signal state of the multi-channel signal.

Wherein, when the signal state includes the received power of each receiving antenna, the receiving end determines the receiving power of each receiving antenna according to the signal strength of the received signal received by each receiving antenna;

When the signal state includes a channel estimation power value of a transmission path of each received signal, the receiving end performs channel estimation on a transmission path of the received signal received by each receiving antenna, according to the obtained channel of the transmission path of each received signal. The estimated power value is used to measure the channel strength of each transmission path; at the same time, the receiving end may further determine the channel strength of each receiving antenna according to the channel estimation power value of the transmission path of each received signal;

When the signal state includes the received power of each receiving antenna and the channel estimated power value of the transmission path of each received signal, the receiving end determines the receiving power of each receiving antenna according to the signal strength of the received signal received by each receiving antenna, Channel estimation is performed on a transmission path of the received signal received by each receiving antenna, and the channel strength of each transmission path is measured according to the obtained channel estimated power value of the transmission path of each received signal.

Step 202: The receiving end turns off the receiving channel of the signal state difference according to the signal state of the multi-channel signal;

The receiving end closes the receiving antenna with low receiving power according to the receiving power of each receiving antenna obtained in step 201, when the signal state includes the receiving power of each receiving antenna;

When the signal state includes a channel estimation power value of a transmission path of each received signal, the receiving end turns off a transmission path with a low channel strength according to the channel strength of each transmission path obtained in step 201; meanwhile, the receiving end may also Receiving, by the channel strength of each receiving antenna obtained in step 201, a receiving antenna having a low channel strength;

When the signal state includes the received power of each receiving antenna and the channel estimated power value of the transmission path of each received signal, the receiving end turns off the receiving antenna with low receiving power according to the receiving power of each receiving antenna obtained in step 201; According to step 201, the channel strength of each transmission path of the unclosed receiving antenna is obtained to close the transmission path with low channel strength.

Embodiment 2

The embodiment of the present invention implements a method for receiving a multi-channel signal, the method includes: the signal state is a received power of each receiving antenna, and the receiving end determines a received power of each receiving antenna according to a signal strength of a received signal of each receiving antenna, The receiving antenna with low receiving power is turned off according to the obtained receiving power of each receiving antenna. As shown in FIG. 3, the specific steps of the method are as follows:

Step 301: The receiving end determines the receiving power of each receiving antenna according to the signal strength of the received signal received by each receiving antenna.

The receiving end determines a Received Signal Strength Indication (RSSI) of each receiving antenna according to the number of receiving antennas set by the receiving antenna and the signal strength of each receiving antenna; the RSSI represents the receiving power of the receiving antenna. The value of the decibel field of the RSSI of each receiving antenna is obtained according to RSSI _{j, dB} = 10 × log ₁₀ (RSSI _j ), where j represents the serial number of the receiving antenna, and j is a natural number such as 1, 2, 3, 4 , RSSI _{j, dB} represents the value of the decibel field of the RSSI of the _jth receiving antenna, and RSSI _j represents the RSSI of the _jth receiving antenna. The RSSI is generally performed by performing power statistics on the received baseband signal for an appropriate period of time and automatically Gain control (AGC, Automatic Gain Control) compensation is usually obtained from the AGC module. The RSSI measurement process is known to those skilled in the art and will not be further described herein.

Step 302: The receiving end turns off the receiving antenna with low receiving power according to the obtained receiving power of each receiving antenna.

The receiving end compares the values of the decibel fields of the RSSIs of any two receiving antennas obtained, and determines, according to the obtained comparison result, that the values of the decibel fields of the RSSIs of the two receiving antennas are at least different from the first comparison threshold. , closing the receiving antenna with a low value of the decibel field of the RSSI;

Specifically, taking the jth receiving antenna and the kth receiving antenna as an example, the value of the decibel field of the RSSI of the jth receiving antenna is RSSI _{j, dB} , and the decibel domain of the RSSI of the kth receiving antenna The value is RSSI _{k, dB} ;

When RSSI _{k, dB ≥} T ₁ + RSSI _{j, dB} , the kth receiving antenna that keeps the received signal strength is turned on, and the receiving antenna with weak received signal strength is turned off, that is, the RSSI _j is turned off, and the _jth corresponding to _dB is closed. Receiving antenna; the T ₁ is a first comparison threshold, which can be set to 10 dB to 20 dB, and can also be adjusted according to actual conditions;

When RSSI _{k, dB} ≤ -T ₁ + RSSI _{j, dB} , the jth receiving antenna with strong received signal strength is turned on, and the receiving antenna with weak received signal strength is turned off, that is, the RSSI _k is turned off, and the _k corresponding to _{dB is} The root receiving antenna, the -T ₁ takes a negative value for the first comparison threshold.

The receiving end periodically turns on the receiving antenna that has been turned off, and determines whether to continue to close the receiving antenna with low receiving power according to the re-measured receiving power of each receiving antenna.

The receiving end opens all the closed receiving antennas in the fixed period T, and performs step 301 again to determine whether to continue to close the receiving antenna; the fixed period T is generally determined according to the frame length of the communication system. For example, the frame lengths of TD-SCDMA, WCDMA, TD-LTE, and LTE-FDD are all 10 ms, and the value of T can be determined according to several integer multiples of the frame length. For example, the value of T is 10 ms to 5.12 s; T can also be determined according to the coherence time of the reference channel in the communication system. For example, in a WCDMA receiver, it is generally required to detect the moving speed of the mobile terminal, that is, the maximum Doppler frequency, and further can derive the coherence time of the reference channel; The detection of the moving speed of the mobile terminal can be statistically obtained by the channel pass rate of the channel estimation over 0 points.

Embodiment 3

The embodiment of the present invention implements a method for receiving a multi-channel signal, the method includes: the signal state is a channel estimation power value of a transmission path of each received signal, and the receiving end performs channel estimation on a transmission path of each received signal, according to each The channel estimation power value of the transmission path of the received signal measures the channel strength of the transmission path of each received signal, and then closes the transmission path with low channel strength according to the channel strength of the transmission path of each received signal; as shown in FIG. 4, the specific steps are as follows:

Step 401: The receiving end performs channel estimation on a transmission path of the received signal received by each receiving antenna.

Wherein, since the received signals may be from different communication systems, the receiving end uses different methods to perform channel estimation on each transmission path, and may perform channel estimation by using a correlation method, an equalization method, or a joint multi-user measurement method, for example, : for the received signal from WCDMA, using the CPICH correlation method to perform channel estimation on the transmission path; for the received signal from GSM, using the decorrelation method of the 26 pilot symbols in the middle of the service slot to perform channel estimation on the transmission path; LTE received signal, using frequency domain equalization method to channel the transmission path Estimating; for the received signal from TD-SCDMA, channel estimation is performed on the transmission path by using the pilot code in the time slot;

The received signal strength of each of the receiving antennas is RSSI _j , and the obtained channel estimation channel is

Where ij represents the transmission path from the ith transmit antenna to the jth receive antenna, and n represents the nth transport path;

The receiving end obtains the channel estimated power value of each transmission path according to the channel estimation of each transmission path, specifically

Obtaining a channel estimated power value of each transmission path, where

The channel estimated power value representing the nth transmission path from the ith transmit antenna to the jth receive antenna.

Step 402: The receiving end measures the channel strength of each transmission path according to the obtained channel estimation power value of the transmission path of each received signal.

The receiving end measures the channel strength of each transmission path according to the channel estimation power value of each transmission path obtained in step 401, and determines the channel strength of the corresponding receiving antenna according to the channel strength of each transmission path. ;

Specifically, taking the transmission path between the ith transmit antenna and the jth receive antenna as an example,

And P _{ij, dB} = 10 × log ₁₀ (P _ij ) to obtain the channel strength of the nth transmission path between the ith transmit antenna and the jth receive antenna and the value of the decibel field of the channel strength of the transmission path Where P _ij represents the channel strength of the transmission path between the i-th transmit antenna and the j-th receive antenna, and P _{ij, dB} represents the channel strength of the transmission path between the i-th transmit antenna and the j-th receive antenna The value of the decibel field, L indicates that there are L multipaths from the ith transmit antenna to the jth receive antenna.

The receiving end further determines the channel strength of the jth receiving antenna and the value of the decibel field of the channel strength according to the obtained P _ij , specifically

And P _{j, dB} = 10 × log ₁₀ (P _j ) to obtain the value of the channel strength of the jth receiving antenna and the decibel field of the channel strength, where i represents the transmitting antenna number, and i=1 represents the first transmitting antenna, P _j represents the channel strength of the jth receiving antenna, and P _{j, dB} represents the value of the decibel field of the channel strength of the jth receiving antenna.

Step 403: The receiving end closes the transmission path with low channel strength according to the obtained channel strength of the transmission path of each received signal.

The receiving end closes the transmission path with a low value of the decibel field according to the value of the decibel field of the channel strength of each transmission path obtained according to step 402, or the receiving end is configured according to the channel of each receiving antenna. The value of the decibel domain of the intensity turns off the receiving antenna with a low value of the decibel domain;

The receiving end compares the value of the decibel field of the channel strength of the transmission path between any two pairs of the transmitting antenna and the receiving antenna according to the value of the decibel field of the channel strength of the transmission path obtained in step 402, and determines the value according to the obtained comparison result. When the values of the decibel fields of the channel strengths of the transmission paths between the two pairs of transmitting antennas and the receiving antennas are at least different from each other by the third comparison threshold, the transmission path with a low value of the decibel domain of the channel strength is turned off;

Specifically, taking the ith root and the hth transmit antenna, and the jth receive antenna as an example, the value of the decibel field of the channel strength of the transmission path from the ith transmit antenna to the jth receive antenna is P _{ij, dB.} The value of the decibel field of the channel strength of the transmission path from the _hth transmitting antenna to the jth receiving antenna is _{Phj, dB} , and the relationship between P _{ij, dB} and _{Phj, dB} is compared:

When P _{ij, dB} ≥ T ₃ + P _{hj, dB} , the transmission path of the hth transmit antenna to the jth receive antenna is turned off, and the transmission path of the ith transmit antenna to the jth receive antenna is turned on; T ₃ is the third comparison threshold, which can be set to 5dB to 15dB, and can also be set according to actual conditions.

When P _ij,dB ≤ -T ₃ +P _hj,dB , the transmission path of the ith transmit antenna to the jth receive antenna is turned off, and the transmission path of the hth transmit antenna to the jth receive antenna is turned on; -T ₃ takes a negative value for the third comparison threshold.

When T ₃ +P _hj,dB >P _ij,dB >-T ₃ +P _hj,dB , the transmission path of the ith transmit antenna to the jth receive antenna and the hth transmit antenna to the jth receive are maintained The transmission path of the antenna is turned on.

Alternatively, the receiving end compares the value of the decibel field of the channel strength of any two receiving antennas according to the value of the decibel field of the channel strength P _j of the received signal on each receiving antenna obtained in step 402, and determines the two receiving The value of the decibel domain of the channel strength of the antenna is at least different from the second comparison threshold, and the receiving antenna having a low value of the decibel domain of the channel strength is turned off;

Specifically, taking the jth receiving antenna and the kth receiving antenna as an example, the value of the decibel field of the channel strength of the jth receiving antenna is _{Pj, dB} , and the value of the decibel field of the channel strength of the kth receiving antenna For P _k,dB , when P _j,dB ≥T ₂ +P _k,dB , keep the jth receiving antenna turned on, turn off the kth receiving antenna; the T ₂ is the second comparison threshold, T ₂ can be set It is 10dB~20dB, and can also be set according to the actual situation.

The receiving end periodically turns on the already closed transmission path or the receiving antenna, and determines whether to continue to close the transmission path with low channel strength or receiving according to the channel strength of the re-measured transmission path of each received signal or the channel strength of the receiving antenna. antenna.

The receiving end opens all the closed receiving antennas or transmission paths in a fixed period T, and the receiving end performs step 401 again to determine whether to continue to close the receiving antenna or the transmission path with low channel strength; The period T determines the value of the fixed period T according to the moving speed of the environment in which the receiving device is detected and the time selectivity of the channel estimation.

Embodiment 4

The embodiment of the present invention implements a method for receiving a multi-channel signal, the method includes: the received signal state is a received power of each receiving antenna and a channel estimated power value of a transmission path of each received signal, and the receiving end is configured according to each receiving antenna. The signal strength of the received signal determines the received power of each receiving antenna, turns off the receiving antenna with low receiving power, and then performs channel estimation on the transmission path of each received signal received by the unclosed receiving antenna, according to the channel of the transmission path of each received signal. Estimating the power value to measure the channel strength of the transmission path of each received signal, and closing the channel strength is low. The transmission path, as shown in Figure 5, the specific steps of the method are as follows:

Step 501: The receiving end determines the receiving power of each receiving antenna according to the signal strength of the received signal received by each receiving antenna.

The receiving end determines a received signal strength indication RSSI of each receiving antenna according to the number of receiving antennas set by itself and the signal strength of each receiving antenna, and the RSSI represents the receiving power of the receiving antenna; each receiving antenna The value of the decibel field of the RSSI is obtained according to RSSI _{j, dB} = 10 × log ₁₀ (RSSI _j ), where j represents the serial number of the receiving antenna, j is a natural number such as 1, 2, 3, 4, and RSSI _{j, dB} indicates j The value of the decibel field of the RSSI of the receiving antenna, RSSI _j represents the RSSI of the _jth receiving antenna. The RSSI is generally obtained by performing power statistics on the received baseband signal for an appropriate period of time and performing AGC compensation, usually from Obtained in the AGC module, the RSSI measurement process is known to those skilled in the art, and will not be further described herein.

Step 502: The receiving end turns off the receiving antenna with low receiving power according to the obtained receiving power of each receiving antenna.

The receiving end first compares the obtained values of the decibel fields of the RSSIs of any two receiving antennas, and determines that the values of the decibel fields of the RSSIs of the two receiving antennas are at least different from the second comparison threshold, and the a receiving antenna with a low value of the decibel field of the RSSI;

Specifically, taking the jth receiving antenna and the kth receiving antenna as an example, the value of the decibel field of the RSSI of the jth receiving antenna is RSSI _{j, dB} , and the decibel domain of the RSSI of the kth receiving antenna The value is RSSI _{k, dB} ;

When RSSI _{k, dB ≥} T ₁ + RSSI _{j, dB} , the kth receiving antenna that keeps the received signal strength is turned on, and the receiving antenna with weak received signal strength is turned off, that is, the RSSI _j is turned off, and the _jth corresponding to _dB is closed. The receiving antenna; the T ₁ is a first comparison threshold, which can be set to 10 dB to 20 dB, and can also be adjusted according to actual conditions.

When RSSI _{k, dB} ≤ -T ₁ + RSSI _{j, dB} , the jth receiving antenna with strong received signal strength is turned on, and the receiving antenna with weak received signal strength is turned off, that is, the RSSI _k is turned off, and the _k corresponding to _{dB is} Root receiving antenna; the -T ₁ takes a negative value for the first comparison threshold.

Step 503: The receiving end performs channel estimation on a transmission path of the received signal received by each receiving antenna that is not closed.

Wherein, since the received signals may be from different communication systems, the receiving end uses different methods to perform channel estimation on each transmission path, and may perform channel estimation by using a correlation method, an equalization method, or a joint multi-user measurement method, for example, : for the received signal from WCDMA, using the CPICH correlation method to perform channel estimation on the transmission path; for the received signal from GSM, using the decorrelation method of the 26 pilot symbols in the middle of the service slot to perform channel estimation on the transmission path; The received signal of LTE adopts frequency domain equalization method to perform channel estimation on the transmission path; for the received signal from TD-SCDMA, channel estimation is performed on the transmission path by using the pilot code in the time slot;

The received signal strength of each of the receiving antennas is RSSI _j , and the obtained channel estimation channel is

Where ij represents the transmission path from the ith transmit antenna to the jth receive antenna, and n represents the nth transport path;

The receiving end obtains the channel estimated power value of each transmission path according to the channel estimation of each transmission path, specifically

Obtaining a channel estimated power value of each transmission path, where

The channel estimated power value representing the nth transmission path from the ith transmit antenna to the jth receive antenna.

Step 504: The receiving end measures the channel strength of each transmission path according to the obtained channel estimation power value of the transmission path of each received signal.

After receiving the receiving antenna with low receiving power, the receiving end measures the channel strength of the transmission path according to the channel estimation power value of each transmission path, and determines corresponding receiving antennas according to the channel strength of each transmission path. The channel strength of the received signal;

Specifically, taking the transmission path between the ith transmit antenna and the jth receive antenna as an example,

And P _{ij, dB} = 10 × log ₁₀ (P _ij ) to obtain the channel strength of the nth transmission path between the ith transmit antenna and the jth receive antenna and the value of the decibel field of the channel strength of the transmission path Where P _ij represents the channel strength of the transmission path between the i-th transmit antenna and the j-th receive antenna, and P _{ij, dB} represents the channel strength of the transmission path between the i-th transmit antenna and the j-th receive antenna The value of the decibel field, L indicates that there are L multipaths from the ith transmit antenna to the jth receive antenna.

The receiving end further determines, according to the obtained P _ij , the channel strength of the jth receiving antenna and the value of the decibel field of the channel strength, specifically

And P _{j, dB} = 10 × log ₁₀ (P _j ) to obtain the value of the channel strength of the jth receiving antenna and the decibel field of the channel strength, where i represents the transmitting antenna number, and i=1 represents the first transmitting antenna, P _j represents the channel strength of the jth receiving antenna, and P _{j, dB} represents the value of the decibel field of the channel strength of the jth receiving antenna.

Step 505: The receiving end closes the transmission path with low channel strength according to the obtained channel strength of the transmission path of each received signal.

After the receiving end closes the receiving antenna with low receiving power, that is, when T ₁ + RSSI _{j, dB} > RSSI _{k, dB} > -T ₁ + RSSI _{j, dB} , the receiving end continues to obtain according to each a value of a decibel field of a channel strength of the transmission path, comparing a value of a decibel field of a channel strength of a transmission path between any two pairs of the transmitting antenna and the receiving antenna, determining a transmission path between the two pairs of the transmitting antenna and the receiving antenna When the value of the decibel domain of the channel strength differs at least by the third comparison threshold, the transmission path with a low value of the decibel domain of the channel strength of the transmission path is closed.

Specifically, taking the ith root and the hth transmit antenna, and the jth receive antenna as an example, the value of the decibel field of the channel strength of the transmission path from the ith transmit antenna to the jth receive antenna is P _{ij, dB.} The value of the decibel field of the channel strength of the transmission path from the _hth transmitting antenna to the jth receiving antenna is _{Phj, dB} , and the relationship between P _{ij, dB} and _{Phj, dB} is compared:

When P _{ij, dB} ≥ T ₃ + P _{hj, dB} , the transmission path of the hth transmit antenna to the jth receive antenna is turned off, and the transmission path of the ith transmit antenna to the jth receive antenna is turned on; T ₃ is the third comparison threshold, which can be set to 5dB to 15dB, and can also be set according to actual conditions.

When P _ij,dB ≤ -T ₃ +P _hj,dB , the transmission path of the ith transmit antenna to the jth receive antenna is turned off, and the transmission path of the hth transmit antenna to the jth receive antenna is turned on; -T ₃ takes a negative value for the third comparison threshold T ₃ .

When T ₃ +P _hj,dB >P _ij,dB >-T ₃ +P _hj,dB , keep the transmission path of the ith transmit antenna to the jth receive antenna from the hth transmit antenna to the jth receive antenna The transmission path is turned on.

The receiving end periodically turns on the receiving antenna and the transmission path that have been turned off, and determines whether to continue to close the receiving antenna with low receiving power according to the received power of the re-measured receiving antenna, and then, according to the channel strength of the re-measured transmission path , to determine whether to continue the transmission path with low channel strength.

The receiving end opens all the closed receiving antennas and the baseband processing channel in a fixed period T, and the receiving end restarts to perform step 501 to determine whether to continue to close the receiving antenna with low receiving power and low channel strength. The transmission path; the fixed period T determines the value of the fixed period T according to the moving speed of the environment in which the receiving device is detected and the time selectivity of the channel estimation.

Embodiment 5

The embodiment of the present invention implements a multi-channel signal receiving apparatus. As shown in FIG. 6, the apparatus includes: a radio frequency receiving processor 3, an analog baseband processor 4, and a digital baseband processor 5;

The radio frequency receiving processor 3 processes the multi-channel signal into a multi-channel analog baseband signal and sends it to the analog baseband processor 4;

The analog baseband processor 4 processes the multi-channel analog baseband signal into a multi-channel digital baseband signal, and sends it to the digital baseband processor 5;

The digital baseband processor 5 measures the signal state of the digital baseband signal of each channel, according to The signal state of the digital baseband signal of each channel turns off the receiving channel of the signal state difference; the multi-channel digital baseband signal is the signal type processed by the multi-channel signal by the RF receiving processor 3 and the analog baseband processor 4. The signal state includes a received power of each receiving antenna and/or a channel estimated power value of a transmission path of a digital baseband signal of each channel.

Embodiment 6

When the signal state includes the received power of each receiving antenna, as shown in FIG. 7, the digital baseband processor 5 of the receiving device includes: a multi-channel power detector 506, a radio frequency switch 6;

The multi-channel power detector 506 determines a received signal strength indication RSSI for each receive antenna based on a signal strength of each of the receive antennas acquired through the digital baseband signals of the respective channels, the RSSI representing a received power of the receive antenna; The value of the decibel field of the RSSI of each receiving antenna is obtained according to RSSI _{j, dB} = 10 × log ₁₀ (RSSI _j ), where j denotes the serial number of the receiving antenna, j is a natural number such as 1, 2, 3, 4, and RSSI _{j dB} represents the value of the decibel field of the RSSI of the _jth receiving antenna, and RSSI _j represents the RSSI of the _jth receiving antenna. The RSSI is generally obtained by performing power statistics on the received baseband signal for an appropriate period of time and performing AGC compensation. It can usually be obtained from the AGC module, and the RSSI measurement process is known to those skilled in the art, and will not be further described here.

The radio frequency switch 6 turns on or off the receiving antenna, and the radio frequency switch 6 is disposed between the receiving antenna and the radio frequency receiving processor 3.

The multi-channel power detector 506 compares the obtained values of the decibel fields of the RSSIs of any two receiving antennas, and determines that the values of the decibel fields of the RSSIs of the two receiving antennas are at least different according to the obtained comparison result. When the threshold is closed, the receiving antenna with a low value of the decibel field of the RSSI is turned off;

Specifically, taking the jth receiving antenna and the kth receiving antenna as an example, the value of the decibel field of the RSSI of the jth receiving antenna is RSSI _{j, dB} , and the decibel domain of the RSSI of the kth receiving antenna The value is RSSI _{k, dB} ;

When RSSI _{k, dB ≥} T ₁ + RSSI _{j, dB} , the multi-channel power detector 506 closes the RF switch 6 of the kth receiving antenna, keeping the kth receiving antenna turned on, and the multi-channel power detector 506 is turned off. The RF switch 6 of the receiving antenna of the antenna closes the _th- th receiving antenna corresponding to the RSSI _{j, dB} ; the T ₁ is a first comparison threshold, which can be set to 10 dB to 20 dB, and can also be adjusted according to actual conditions.

When RSSI _{k, dB} ≤ -T ₁ + RSSI _{j, dB} , the multi-channel power detector 506 closes the RF switch 6 of the jth receiving antenna, keeping the jth receiving antenna turned on, and the multi-channel power detector 506 is turned off. k receiving antenna RF switch 6, turning off the RSSI _{k, dB} corresponding to the kth receiving antenna; the -T ₁ is a negative value of the first comparison threshold.

Example 7

When the signal state includes a channel estimation power value of a transmission path of each received signal, as shown in FIG. 8, the digital baseband processor 5 of the receiving apparatus includes: a multi-channel estimation processor 501, and a multi-channel power detector 506. Channel switch 503;

The multi-channel estimation processor 501 uses different methods to perform channel estimation on the transmission path of each digital baseband signal according to different received communication signals, and may perform methods such as correlation method, equalization method or joint multi-user measurement method. Channel estimation, for example, for the received signal from WCDMA, using the CPICH correlation method to perform channel estimation on the transmission path; for the received signal from GSM, using the decorrelation method of the 26 pilot symbols in the middle of the service slot to channel the transmission path Estimating; for the received signal from LTE, using the frequency domain equalization method to perform channel estimation on the transmission path; for the received signal from TD-SCDMA, using the pilot code in the time slot to perform channel estimation on the transmission path;

The multi-channel estimation processor 501 obtains the channel estimation power value of each transmission path according to the channel estimation of each transmission path, specifically

Obtaining a channel estimated power value of each transmission path, where

The channel estimated power value representing the nth transmission path from the ith transmit antenna to the jth receive antenna.

The channel switch 503 opens or closes a transmission path, and the channel switch 503 is set at a plurality of The output of channel estimation processor 501.

The multi-channel power detector 506 measures the channel strength of the transmission path of the digital baseband signal of each channel according to the channel estimation power value of the transmission path of the digital baseband signal of each channel, and the received signal strength of each receiving antenna is RSSI _j , according to The channel estimate of the transmission path obtained by RSSI _j is

Where ij represents the transmission path from the ith transmit antenna to the jth receive antenna, and n represents the nth transport path;

The multi-channel power detector 506 determines a value of a decibel field of a channel strength of the transmission path according to a channel strength of the obtained transmission path;

Specifically, taking the transmission path between the ith transmit antenna and the jth receive antenna as an example, the multi-channel power detector 506 passes

And P _{ij, dB} = 10 × log ₁₀ (P _ij ) to obtain the channel strength of the nth transmission path between the ith transmit antenna and the jth receive antenna and the value of the decibel field of the channel strength of the transmission path Where P _ij represents the channel strength of the transmission path between the i-th transmit antenna and the j-th receive antenna, and P _{ij, dB} represents the channel strength of the transmission path between the i-th transmit antenna and the j-th receive antenna The value of the decibel field, L indicates that there are L multipaths from the ith transmit antenna to the jth receive antenna.

The multi-channel power detector 506 compares the value of the decibel field of the channel strength of the transmission path between any two transmitting antennas and the receiving antenna according to the obtained value of the decibel field of the channel strength of each transmission path, according to the obtained comparison. As a result, it is determined that when the value of the decibel field of the channel strength of the transmission path between the two pairs of transmitting antennas and the receiving antenna is at least different from the third comparison threshold, the transmission path with a low value of the decibel field of the channel strength of the transmission path is closed;

Specifically, taking the ith root and the hth transmit antenna, and the jth receive antenna as an example, the value of the decibel field of the channel strength of the transmission path from the ith transmit antenna to the jth receive antenna is P _{ij, dB.} The value of the decibel field of the channel strength of the transmission path from the _hth transmitting antenna to the jth receiving antenna is P _{hj, dB} , and the relationship between P _{ij, dB} and _{Phj, dB} is compared:

When P _{ij, dB} ≥ T ₃ + P _{hj, dB} , the multi-channel power detector 506 disconnects the channel switch 503 of the transmission path of the hth transmitting antenna to the jth receiving antenna, and turns off the hth transmitting antenna. To the transmission path of the jth receiving antenna, the multichannel power detector 506 closes the channel switch 503 of the transmission path of the i-th transmitting antenna to the jth receiving antenna, and holds the ith transmitting antenna to the jth receiving antenna The transmission path is turned on; the T ₃ is a third comparison threshold, which can be set to 5 dB to 15 dB, and can also be set according to actual conditions.

When P _{ij, dB} ≤ -T ₃ +P _{hj, dB} , the multi-channel power detector 506 disconnects the channel switch 503 of the transmission path of the ith transmit antenna to the jth receive antenna, and turns off the ith transmission. a transmission path of the antenna to the jth receiving antenna, the multi-channel power detector 506 closing the channel switch 503 of the transmission path of the hth transmitting antenna to the jth receiving antenna, and maintaining the hth transmitting antenna to the jth receiving The transmission path of the antenna is turned on; the -T ₃ takes a negative value for the third comparison threshold.

When T ₃ +P _hj,dB >P _ij,dB >-T ₃ +P _hj,dB , the multi-channel power detector 506 closes the channel switch 503 of all transmission paths, keeping the ith transmit antenna to the jth The transmission path of the root receiving antenna and the transmission path from the hth transmitting antenna to the jth receiving antenna are both turned on.

Example eight

When the signal state includes a channel estimation power value of a transmission path of each received signal, as shown in FIG. 9, the digital baseband processor 5 of the receiving apparatus includes: a multi-channel estimation processor 501, and a multi-channel power detector 506. , RF switch 6;

The multi-channel power detector 506 determines the channel strength of the jth receiving antenna and the value of the decibel field of the channel strength according to the obtained value P _ij of the decibel domain of the channel strength of each transmission path, specifically

And P _{j, dB} = 10 × log ₁₀ (P _j ) to obtain the value of the channel strength of the jth receiving antenna and the decibel field of the channel strength, where i represents the transmitting antenna number, and i=1 represents the first transmitting antenna, P _j represents the channel strength of the jth receiving antenna, and P _{j, dB} represents the value of the decibel domain of the channel strength of the jth receiving antenna.

The radio frequency switch 6 turns on or off the receiving antenna, and the radio frequency switch 6 is disposed between the receiving antenna and the radio frequency receiving processor 3.

The multi-channel power detector 506 compares the value of the decibel field of the channel strength of any two receiving antennas according to the obtained value of the decibel field of the channel strength P _j of each receiving antenna, and determines the two roots according to the obtained comparison result. When the value of the decibel field of the channel strength of the receiving antenna is at least different from the second comparison threshold, the receiving antenna with a low value of the decibel domain of the channel strength is turned off;

Specifically, taking the jth receiving antenna and the kth receiving antenna as an example, the value of the decibel field of the channel strength of the jth receiving antenna is _{Pj, dB} , and the value of the decibel field of the channel strength of the kth receiving antenna Is P _{k, dB} , when P _{j, dB ≥} T ₂ + P _{k, dB} , the multi-channel power detector 506 closes the RF switch 6 of the jth receiving antenna, keeping the jth receiving antenna turned on, multi-channel power disconnection detector 506 k-th receive antenna RF switch 6 off k-th receive antenna; T ₂ is the second comparison threshold can be set to 10dB ~ 20dB, it may be provided according to the actual situation.

Example nine

When the signal state includes the received power of each receiving antenna and the channel estimated power value of the transmission path of each received signal, as shown in FIG. 10, the digital baseband processor 5 includes: a multi-channel estimation processor 501, and multiple channels. Power detector 506, RF switch 6, channel switch 503;

The multi-channel power detector 506 compares the obtained values of the decibel fields of the RSSIs of any two receiving antennas, and determines that the values of the decibel fields of the RSSIs of the two receiving antennas are at least different according to the obtained comparison result. At the threshold, the receiving antenna with a low value of the decibel field of the RSSI is turned off; then the multi-channel estimation processor 501 is notified to perform channel estimation on the transmission path of the digital baseband signal of each channel on the unclosed receiving antenna;

After receiving the notification from the multi-channel power detector 506, the multi-channel estimation processor 501 performs channel estimation on the transmission path of the digital baseband signal of each channel on the unclosed receiving antenna, and obtains per channel estimation according to the channel of each transmission path. Channel estimated power value of the transmission path, sent To the multi-channel power detector 506;

The multi-channel power detector 506 measures the channel strength of the transmission path of the digital baseband signal of each channel according to the channel estimation power value of the transmission path of the digital baseband signal of each channel, and determines the transmission according to the channel strength of the obtained transmission path. a value of a decibel field of a channel strength of a path; a value of a decibel field of a channel strength of a transmission path between any two transmitting antennas and a receiving antenna, and determining between the two pairs of transmitting antennas and receiving antennas based on the obtained comparison result When the value of the decibel domain of the channel strength of the transmission path differs at least by the third comparison threshold, the transmission path of the decibel domain whose channel strength of the transmission path is low is closed.

The multi-channel power detector 506 periodically turns on the already closed transmission path and/or the receiving antenna, and determines whether to continue to turn off the channel strength according to the channel strength of the re-measured transmission path and/or the channel strength of the receiving antenna. a low transmission path and/or a receiving antenna; wherein the multi-channel power detector 506 turns on all closed transmission paths and/or receiving antennas during a fixed period T, the multi-channel power detector 506 based on re-measurement Determining whether to continue to turn off the transmission path and/or the receiving antenna with low signal strength to the transmission path and/or the signal strength of the receiving antenna; the fixed period T is based on the environment in which the receiving device is detected by the multi-channel power detector 506 The moving speed and the time selectivity of the channel estimation specifically determine the value of the fixed period T.

Example ten

As shown in FIG. 11, the digital baseband processor 5 of the receiving device further includes a channel noise reduction processor 502, a multi-channel signal detector 504, a frequency domain characteristic and speed estimation processor 505; wherein:

The channel noise reduction processor 502 receives the digital baseband signal and the channel estimation of each transmission path sent by the multi-channel estimation processor 501, performs noise reduction processing on the channel estimation of each transmission path, and sends the channel estimation to the multi-channel power detector 506; The digital baseband signal is subjected to noise reduction processing, and sent to the frequency domain characteristic and speed estimation processor 505;

The frequency domain characteristic and speed estimation processor 505 analyzes the channel characteristics of the digital baseband signal and transmits it to the multi-channel signal detector 504; for example, the frequency domain of the digital baseband signal can be Sexual analysis to obtain the frequency selectivity of the wireless channel;

The multi-channel signal detector 504 selects a digital baseband signal according to a receiving algorithm; for example, for a WCDMA receiver, if the frequency domain characteristics are good, a chip-level equalization receiving algorithm can be performed (or at a chip-level basis) On the multi-sample equalization reception), satisfactory reception performance is obtained; when the frequency domain characteristics are not good, that is, the frequency selectivity is poor, the conventional RAKE reception algorithm is adopted.

The method for receiving a multi-channel signal according to an embodiment of the present invention may also be stored in a computer readable storage medium if it is implemented in the form of a software function module and sold or used as a stand-alone product. Based on such understanding, the technical solution of the embodiments of the present invention may be embodied in the form of a software product in essence or in the form of a software product stored in a storage medium, including a plurality of instructions. A computer device (which may be a personal computer, server, or network device, etc.) is caused to perform all or part of the methods described in various embodiments of the present invention. The foregoing storage medium includes: a U disk, a removable hard disk, a read-only memory (ROM), a magnetic disk, or an optical disk, and the like, which can store program codes. Thus, embodiments of the invention are not limited to any specific combination of hardware and software.

Correspondingly, an embodiment of the present invention further provides a computer storage medium, wherein a computer program for executing a multi-channel signal receiving method according to an embodiment of the present invention is stored.

The above is only the preferred embodiment of the present invention, and is not intended to limit the scope of the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in Within the scope of protection of the present invention.

Industrial applicability

According to various embodiments of the present invention, the receiving end can close the receiving channel of the signal state difference according to the signal state of the multi-channel signal, simplifying the processing of the receiving end, reducing the calculation amount of the receiving end, thereby reducing the receiving complexity and power consumption.

Claims (13)

1. A method for receiving a multi-channel signal, the method comprising:

   The receiving end measures the signal state of the multi-channel signal, and closes the receiving channel of the signal state difference according to the signal state of the multi-channel signal; the signal state includes the receiving power of each receiving antenna and/or the channel estimated power value of the transmission path of each received signal. .
2. The receiving method according to claim 1, wherein the receiving end measures the signal state of the multi-channel signal, and the receiving channel that closes the signal state difference according to the signal state of the multi-channel signal is: the signal state is the receiving of each receiving antenna The receiving end determines the received power of each receiving antenna according to the signal strength of the received signal of each receiving antenna, and turns off the receiving antenna with low receiving power according to the received receiving power of each receiving antenna.
3. The receiving method according to claim 1, wherein the receiving end measures the signal state of the multi-channel signal, and the receiving channel that closes the signal state difference according to the signal state of the multi-channel signal is: the signal state is the transmission of each received signal Channel estimation power value of the path, the receiving end performs channel estimation on the transmission path of each received signal, and measures the channel strength of the transmission path of each received signal according to the channel estimation power value of the transmission path of each received signal, and then according to the transmission of each received signal The channel strength of the path closes the transmission path with low channel strength.
4. The receiving method according to claim 1, wherein the receiving end measures the signal state of the multi-channel signal, and the receiving channel that closes the signal state difference according to the signal state of the multi-channel signal is: the signal state is the transmission of each received signal Channel estimation power value of the path, the receiving end performs channel estimation on the transmission path of each received signal, determines the channel strength of each receiving antenna according to the channel estimation power value of the transmission path of each received signal, and then closes the channel according to the channel strength of each receiving antenna. Low-intensity receiving antenna.
5. The receiving method according to claim 1, wherein the receiving end measures the signal state of the multi-channel signal, and the receiving channel that closes the signal state difference according to the signal state of the multi-channel signal is: the receiving signal state is the receiving antenna Letter of received power and transmission path of each received signal The channel estimates the power value, and the receiving end determines the receiving power of each receiving antenna according to the signal strength of the receiving signal of each receiving antenna, turns off the receiving antenna with low receiving power, and then performs the transmission path of each received signal received by the unclosed receiving antenna. The channel estimation measures the channel strength of the transmission path of each received signal according to the channel estimation power value of the transmission path of each received signal, and closes the transmission path with a low channel strength.
6. The receiving method according to claim 1, wherein the method further comprises: after the receiving channel according to the signal state of the multi-channel signal is turned off, the receiving end periodically turns on the receiving channel that has been turned off, according to The signal state of the re-measured multi-channel signal determines whether to continue to close the receiving channel of the signal state difference.
7. A receiving device for a multi-channel signal, the device comprising: a radio frequency receiving processor, an analog baseband processor, and a digital baseband processor; wherein

   The radio frequency receiving processor is configured to process the multi-channel signal into a multi-channel analog baseband signal and send the signal to the analog baseband processor;

   The analog baseband processor is configured to process the multi-channel analog baseband signal into a multi-channel digital baseband signal and transmit the signal to a digital baseband processor;

   The digital baseband processor is configured to measure a signal state of a digital baseband signal of each channel, and close a receiving channel of a signal state difference according to a signal state of the digital baseband signal of each channel;

   The signal state includes a received power of each receiving antenna and/or a channel estimated power value of a transmission path of a digital baseband signal of each channel.
8. The receiving device according to claim 7, wherein the digital baseband processor comprises: a multi-channel power detector, a radio frequency switch, wherein

   The multi-channel power detector is configured to determine the received power of each receiving antenna according to the signal strength of the digital baseband signal of each receiving antenna, and turn off the radio frequency switch corresponding to the receiving antenna with low receiving power according to the obtained receiving power of each receiving antenna;

   The radio frequency switch is configured to open or close a receiving antenna.
9. The receiving apparatus according to claim 7, wherein said digital baseband processor comprises: a multi-channel estimation processor, a multi-channel power detector, and a channel switch, wherein

   The multi-channel estimation processor is configured to perform channel estimation on a transmission path of a digital baseband signal of each channel, and send a channel estimation power value of a transmission path of the digital baseband signal of each channel to the multi-channel power detector;

   The multi-channel power detector is configured to measure a channel strength of a transmission path of a digital baseband signal of each channel according to a channel estimation power value of a transmission path of a digital baseband signal of each channel, and then according to a transmission path of the digital baseband signal of each channel Channel strength closes the channel switch corresponding to the transmission path with low channel strength;

   The channel switch is configured to open or close a transmission path.
10. The receiving apparatus according to claim 7, wherein said digital baseband processor comprises: a multi-channel estimation processor, a multi-channel power detector, and a channel switch, wherein

    The multi-channel estimation processor is configured to perform channel estimation on a transmission path of a digital baseband signal of each channel, and send a channel estimation power value of a transmission path of the digital baseband signal of each channel to the multi-channel power detector;

    The multi-channel power detector is configured to determine a channel strength of each receiving antenna according to a channel estimation power value of a transmission path of a digital baseband signal of each channel, and then close a receiving antenna with a low channel strength according to channel strength of each receiving antenna.
11. The receiving apparatus according to claim 7, wherein the digital baseband processor comprises: a multi-channel estimation processor, a multi-channel power detector, a radio frequency switch, a channel switch, wherein

    The multi-channel power detector is configured to determine the received power of each receiving antenna according to the signal strength of the digital baseband signal of each receiving antenna, and turn off the radio frequency switch corresponding to the receiving antenna with low receiving power according to the obtained receiving power of each receiving antenna; Then, the multi-channel estimation processor is notified to perform channel estimation on the transmission path of the digital baseband signal of each channel on the unclosed receiving antenna, and the number of each channel is measured according to the channel estimation power value of the transmission path of the digital baseband signal of each channel. Channel strength of the transmission path of the baseband signal, and then closing the channel switch corresponding to the transmission path with low channel strength according to the channel strength of the transmission path of the digital baseband signal of each channel;

    The multi-channel estimation processor is configured to perform channel estimation on a transmission path of a digital baseband signal of each channel on an unclosed receiving antenna, and transmit a channel estimation power value of a transmission path of the digital baseband signal of each channel to the multi-channel power Detector;

    The radio frequency switch is configured to open or close a receiving antenna;

    The channel switch is configured to open or close a transmission path.
12. The receiving apparatus according to claim 7, wherein said digital baseband processor is further configured to periodically turn on a receiving channel that has been turned off, and determine whether to continue to turn off based on the signal state of the newly measured digital baseband signal of each channel. The receiving channel of the signal state difference.
13. A computer storage medium storing therein a computer program for performing the method of receiving a multi-channel signal according to any one of claims 1 to 6.

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