A 5G millimeter wave same-frequency multi-cell beam detection method

Abstract

The application discloses a 5G millimeter wave same-frequency multi-cell beam detection method and belongs to the technical field of 5G. According to the 5G millimeter wave frequency band specified in the 3GPP protocol, the corresponding band search is carried out. After the band search is completed, the same-frequency multi-cell beam search is carried out. Considering that the receiving end will receive the superposition of broadcast signals of adjacent cells, after the PSS correlation is completed, a certain threshold is set to lock the possible SSB beams. The locked SSB beams are subjected to correlation operation with ideal SSS sequences, and if the correlation value exceeds a certain threshold, the SSB beams are regarded as candidate beams. Finally, the CRC check is completed through the analysis of the PBCH channel, and if the check is passed, it can be considered as an effective beam. The application can effectively solve the 5G same-frequency multi-cell blind search problem in the road test equipment.

Description

Technical Field

[0001] This invention relates to the field of 5G technology, and specifically to a 5G millimeter wave co-frequency multi-cell beam detection method. Background Technology

[0002] In 5G millimeter-wave technology, adjacent cells receive superimposed broadcast signals from different cells. Effectively detecting all beams is a challenge that drive test instruments need to address. Relevant literature only describes searching for broadcast signals within a single cell, failing to perform a full-area search between adjacent cells. To address this issue, this invention proposes a 5G millimeter-wave co-frequency multi-cell beam detection method, capable of effectively detecting 5G millimeter-wave signals at the edges of adjacent cells. Summary of the Invention

[0003] To address the aforementioned technical problems in existing technologies, this invention provides a 5G millimeter wave co-frequency multi-cell beam detection method. This method is rationally designed, overcomes the shortcomings of existing technologies, and achieves excellent results.

[0004] To achieve the purpose of the invention, the following technical solution is adopted:

[0005] A method for detecting beams in multiple cells on the same frequency in 5G millimeter wave, comprising the following steps:

[0006] Step 1: Divide the frequency domain search area into several sub-blocks according to all 5G millimeter wave frequency bands specified in the 3GPP protocol;

[0007] Step 2: In each corresponding sub-block, the local ideal PSS sequence is used to perform correlation operation with the time domain signal of the receiving end, the peak-to-average power ratio of the correlation matrix is ​​calculated, and the corresponding threshold is set to perform initial locking of the SSB beam, where the threshold is set to 5;

[0008] Step 3: Correlate the SSB beam locked in Step 2 with the local ideal SSS sequence and calculate the peak-to-average power ratio of the correlation matrix. If the ratio exceeds the corresponding threshold, the corresponding SSB beam is a candidate beam.

[0009] Step 4: Perform corresponding PBCH channel decoding on all candidate beams. If the CRC check passes, the corresponding candidate beam is a valid beam, thus completing the 5G millimeter wave co-frequency multi-cell beam detection.

[0010] Furthermore, in step 1, the frequency domain search area is divided into several sub-blocks f according to all 5G millimeter-wave frequency bands specified in the 3GPP protocol:

[0011] f = {f1, f2, f3, ..., f n};(1)

[0012] Where f2-f1=17.28MHz.

[0013] Furthermore, step 2 includes the following sub-steps:

[0014] Step 2.1: In each corresponding sub-block, perform correlation operations between the local ideal PSS sequence and the received time-domain signal, and the result is P. i :

[0015]

[0016] Where r(k) is the time-domain signal at the receiving end, s(m) is the local ideal PSS sequence, and N is the number of FFT points;

[0017] Step 2.2: Calculate the peak-to-mean ratio m of the correlation matrix. PAPR Set the corresponding threshold to perform initial SSB beam locking, where threshold Threshoud1 is set to 5:

[0018]

[0019] A1 indicates successful initial cell location identification; 1 indicates valid, 0 indicates invalid. (This is a cell group identifier.) Through P i (k) is obtained when it reaches its maximum value.

[0020] Furthermore, step 3 includes the following sub-steps:

[0021] Step 3.1: Correlate the SSB beam locked in Step 2 with the local ideal SSS sequence, the result of which is P. i ':

[0022]

[0023] Where r(k) is the time-domain signal at the receiving end, p(m) is the local ideal SSS sequence, and N is the number of FFT points;

[0024] Step 3.2: Calculate the peak-to-mean ratio m of the correlation matrix. PAPR2 Set the appropriate threshold for initial SSB beam locking; the threshold is set to 5.

[0025]

[0026] A2 represents the cell lock success indicator, with 1 indicating valid and 0 indicating invalid. (Cell group identifier) Through P i This is obtained when '(k) reaches its maximum value.

[0027] Furthermore, step 4 includes the following sub-steps:

[0028] Step 4.1: Calculate the cell identifier

[0029]

[0030] Step 4.2: For all candidate beams, use cell identifiers Perform the corresponding PBCH channel decoding. If the CRC check is successful, the corresponding candidate beam is a valid 5G beam.

[0031] The beneficial effects of this invention are:

[0032] The method disclosed in this invention is based on a 5G signal processing platform and proposes a method for detecting beams of multiple cells in the same frequency in 5G millimeter wave signals, which solves the problem of detecting beams of multiple cells in the same frequency in 5G millimeter wave signals. Attached Figure Description

[0033] Figure 1 This is a flowchart of a 5G millimeter wave co-frequency multi-cell beam detection method according to the present invention; Detailed Implementation

[0034] The specific embodiments of the present invention will be further described below with reference to specific examples:

[0035] A method for detecting beams in multiple cells on the same frequency in 5G millimeter wave, such as Figure 1 As shown, it includes the following steps:

[0036] Step 1: Divide the frequency domain search area into several sub-blocks according to all 5G millimeter wave frequency bands specified in the 3GPP protocol;

[0037] In step 1, the frequency domain search area is divided into several sub-blocks f according to all 5G millimeter wave frequency bands specified in the 3GPP protocol:

[0038] f = {f1, f2, f3, ..., f n};(1)

[0039] Where f2-f1=17.28MHz.

[0040] Step 2: In each corresponding sub-block, the local ideal PSS sequence is used to perform correlation operation with the time domain signal of the receiving end, the peak-to-average power ratio of the correlation matrix is ​​calculated, and the corresponding threshold is set to perform initial locking of the SSB beam, where the threshold is set to 5;

[0041] Step 2 includes the following sub-steps:

[0042] Step 2.1: In each corresponding sub-block, perform correlation operations between the local ideal PSS sequence and the received time-domain signal, and the result is P. i:

[0043]

[0044] Where r(k) is the time-domain signal at the receiving end, s(m) is the local ideal PSS sequence, and N is the number of FFT points;

[0045] Step 2.2: Calculate the peak-to-mean ratio m of the correlation matrix. PAPR Set the corresponding threshold to perform initial SSB beam locking, where threshold Threshoud1 is set to 5:

[0046]

[0047] A1 indicates successful initial cell location identification; 1 indicates valid, 0 indicates invalid. (This is a cell group identifier.) Through P i (k) is obtained when it reaches its maximum value.

[0048] Step 3: Correlate the SSB beam locked in Step 2 with the local ideal SSS sequence and calculate the peak-to-average power ratio of the correlation matrix. If the ratio exceeds the corresponding threshold, the corresponding SSB beam is a candidate beam.

[0049] Step 3 includes the following sub-steps:

[0050] Step 3.1: Correlate the SSB beam locked in Step 2 with the local ideal SSS sequence, the result of which is P. i ':

[0051]

[0052] Where r(k) is the time-domain signal at the receiving end, p(m) is the local ideal SSS sequence, and N is the number of FFT points;

[0053] Step 3.2: Calculate the peak-to-mean ratio m of the correlation matrix. PAPR2 Set the appropriate threshold for initial SSB beam locking; the threshold is set to 5.

[0054]

[0055] A2 represents the cell lock success indicator, with 1 indicating valid and 0 indicating invalid. (Cell group identifier) Through P i This is obtained when '(k) reaches its maximum value.

[0056] Step 4: Perform corresponding PBCH channel decoding on all candidate beams. If the CRC check passes, the corresponding candidate beam is a valid beam, thus completing the 5G millimeter wave co-frequency multi-cell beam detection.

[0057] Step 4 includes the following sub-steps:

[0058] Step 4.1: Calculate the cell identifier

[0059]

[0060] Step 4.2: For all candidate beams, use cell identifiers Perform the corresponding PBCH channel decoding. If the CRC check is successful, the corresponding candidate beam is a valid 5G beam.

[0061] Of course, the above description is not intended to limit the present invention, and the present invention is not limited to the examples given above. Any changes, modifications, additions or substitutions made by those skilled in the art within the scope of the present invention should also fall within the protection scope of the present invention.

Claims

1. A method for detecting beams in multiple cells on the same frequency in 5G millimeter wave, characterized in that, Includes the following steps: Step 1: Divide the frequency domain search area into several sub-blocks according to all 5G millimeter wave frequency bands specified in the 3GPP protocol. Perform a band search; Step 2: In each corresponding sub-block, the local ideal PSS sequence is used to perform correlation operation with the time domain signal of the receiving end, the peak-to-average power ratio of the correlation matrix is ​​calculated, and the corresponding threshold is set to perform initial locking of the SSB beam, where the threshold is set to 5; Step 3: Correlate the SSB beam locked in Step 2 with the local ideal SSS sequence and calculate the peak-to-average power ratio of the correlation matrix. If the ratio exceeds the corresponding threshold, it is a candidate beam. Step 4: Perform corresponding PBCH channel decoding on all candidate beams. If the CRC check passes, the corresponding candidate beam is a valid beam, thus completing the 5G millimeter wave co-frequency multi-cell beam detection. Step 2 includes the following sub-steps: Step 2.1: In each corresponding sub-block, perform correlation operations between the local ideal PSS sequence and the received time-domain signal, and the result is... : ；（2） in, For time variables, For community group signage Three different values, For the receiving end time domain signal, The local ideal PSS sequence is given, and N is the number of FFT points. Step 2.2: Calculate the peak-to-mean ratio of the correlation matrix. Set the corresponding threshold to perform initial SSB beam locking, where the threshold... Set to 5: ；（3） in To initially identify a successful community entry, 1 indicates valid and 0 indicates invalid. (Community group identifier) pass The maximum value is obtained when the maximum value is taken. Step 3 includes the following sub-steps: Step 3.1: Correlate the SSB beam locked in Step 2 with the local ideal SSS sequence. The result is... : ；（4） in, For the receiving end time domain signal, The local ideal SSS sequence is given, and N is the number of FFT points. Step 3.2: Calculate the peak-to-mean ratio of the correlation matrix. Set the appropriate threshold for initial SSB beam locking; the threshold is set to 5. ；（5） in To indicate successful cell locking, 1 indicates valid, 0 indicates invalid, and the cell group identifier is used. pass This is obtained when the maximum value is taken.

2. The 5G millimeter-wave co-frequency multi-cell beam detection method according to claim 1, characterized in that, In step 1, the frequency domain search area is divided into several sub-blocks according to all 5G millimeter wave frequency bands specified in the 3GPP protocol. : ；（1） in, .

3. The 5G millimeter-wave co-frequency multi-cell beam detection method according to claim 1, characterized in that, Step 4 includes the following sub-steps: Step 4.1: Calculate the cell identifier : ；（6） Step 4.2: For all candidate beams, use cell identifiers Then, perform the corresponding PBCH channel decoding. If the CRC check is successful, the corresponding candidate beam is a valid 5G beam.

Images