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Method and device for antenna failure compensation
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A compensation method and antenna technology, applied in radio transmission systems, baseband system components, transmitter monitoring and other directions, can solve problems such as system performance degradation, and achieve the effect of improving performance
Active Publication Date: 2019-12-27
ZTE CORP
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When the antenna fails, the system performance will be severely degraded
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Embodiment 1
[0051] Assume that the two antennas in the OFDM system are normal, and the system frequency offset is 0 Hz.
[0052] Step 1: Node B performs channel estimation on the pilot symbols received by the two antennas respectively, and obtains the channel estimation values of the two time slots of the first antenna as H(k,0,0) and H(k,0,1 ), the channel estimates of the two time slots of the second antenna are H(k,1,0) and H(k,1,1);
[0053] Step 2: Node B calculates the phase difference of the two antennas, and calculates the estimated frequency offset value based on the phase difference to be 10Hz;
[0054] Step 3: Node B performs MMSE filtering on the channel estimation values of the two antennas respectively;
[0055] Step 4: Node B calculates the noise energy NI of the two antennas through the channel estimation before and after filtering 0 = 10000 and NI 1 =12000;
[0056] Step 5: Node B uses the noise energy of each antenna to correct the frequency offset, and obtains a...
Embodiment 2
[0060] Assume that when one antenna is normal and the other fails in the OFDM system, the system frequency offset is 0 Hz.
[0061] Step 1: Node B performs channel estimation on the pilot symbols received by the two antennas respectively, and obtains the channel estimation values of the two time slots of the first antenna as H(k,0,0) and H(k,0,1 ), the channel estimates of the two time slots of the second antenna are H(k,1,0) and H(k,1,1);
[0062] Step 2: Node B calculates the phase difference between the two antennas, and calculates the estimated frequency offset based on the phase difference to be 200Hz;
[0063] Step 3: Node B performs MMSE filtering on the channel estimation values of the two antennas respectively;
[0064] Step 4: Node B calculates the noise energy NI of the two antennas through the channel estimation before and after filtering 0 = 8000 and NI 1 = 300000;
[0065] Step 5: Node B uses the noise energy of each antenna to correct the frequency offse...
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Abstract
Disclosed is an antenna failure compensation method, comprising: performing channel estimation on a received pilot symbol, and obtaining a channel estimation value; obtaining, based on the channel estimation value, noise energy of each antenna; correcting, based on the noise energy, a frequency offset estimation value; and performing, based on the corrected frequency offset estimation value, frequency offset compensation. Embodiments of the present invention also provide an antenna failure compensation apparatus.
Description
technical field [0001] The invention relates to the field of wireless communication, in particular to a method and device for antenna failure compensation. Background technique [0002] Long Term Evolution (LTE, Long Term Evolution) is a long-term evolution result of the Universal Mobile Telecommunications System (UMTS, Universal Mobile Telecommunications System) technical standard formulated by the Third Generation Partnership Project (3GPP, The3rd Generation Partnership Project). Orthogonal Frequency Division Multiplexing (OFDM, Orthogonal Frequency Division Multiplexing) technology has attracted widespread attention as a high-speed transmission technology with high spectrum utilization efficiency and good anti-multipath performance. Multi-antenna technology is one of the core technologies of the LTE system. Combined with OFDM technology, it can well realize the joint processing and scheduling of multi-dimensional signals, and greatly improve the flexibility and transmissi...
Claims
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