Channel estimation method, coherent combining method, circuit, sensor, and device
AssigneeCalterah Semiconductor Technology (Shanghai) Co., Ltd.
InventorsZeyu HAN, Huiqiang ZHOU, Wenzheng LI, Zhongxin YU
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Abstract
The present disclosure relates to the field of wireless ranging technology and discloses a channel estimation method, a coherent combining method, a circuit, a sensor, and a device. The channel estimation method for ultra-wide band ranging includes: performing channel estimation on at least two fragments respectively to obtain channel impulse responses of the at least two fragments, where the at least two fragments originate from a same multi-millisecond (MMS) data packet; and integrating the channel impulse responses of at least two fragments to obtain the channel impulse response of the MMS data packet.
Claims20
A channel estimation method for wireless ranging, comprising:
- performing channel estimation on at least two fragments respectively to obtain channel impulse responses (CIRs) of the at least two fragments, wherein the at least two fragments originate from a same ranging packet;
- and
- integrating the channel impulse responses of the at least two fragments to obtain a channel impulse response of the ranging packet.
A coherent combining method for channel impulse response, applicable to UWB ranging using a format of a frame data packet, wherein the frame data packet comprises a plurality of non-contiguous fragments, and a total time window for CIR estimation of a respective fragment of the plurality of fragments comprises a plurality of sub-fragment time windows;
- the coherent combining method comprises:
- performing CIR estimation within the plurality of sub-fragment time windows to obtain sub-fragment CIRs;
- acquiring at least one of a fragment frequency offset and a fragment time offset based on the sub-fragment CIRs within the respective fragment;
- compensating for the sub-fragment CIRs using at least one of the fragment frequency offset and the fragment time offset;
- and
- performing coherent combining based on compensated sub-fragment CIRs to obtain a total CIR of the respective fragment;
- and/or,
- wherein a total time window for CIR estimation of a respective frame comprises a plurality of sub-frame time windows with fragment as a basic unit;
- the coherent combining method comprises:
- performing CIR estimation within the plurality of sub-frame time windows to obtain sub-frame CIRs;
- acquiring at least one of a frame frequency offset and a frame time offset based on the sub-frame CIRs within the respective frame;
- compensating for the sub-frame CIRs using at least one of the frame frequency offset and the frame time offset;
- and
- performing coherent combining based on compensated sub-frame CIRs to obtain a total CIR of the respective frame.
An integrated circuit, comprising a radio frequency module, an analog signal processing module, and a digital signal processing module connected in series;
- wherein the radio frequency module is configured to receive analog signals;
- the analog signal processing module is configured to perform down-conversion processing on the analog signals to obtain intermediate frequency signals;
- and
- the digital signal processing module is configured to perform analog-to-digital conversion on the intermediate frequency signals, and to perform digital signal processing on data obtained from the analog-to-digital conversion, wherein the digital signal processing performed by the digital signal processing module comprises operations of a channel estimation method for UWB ranging;
- wherein the channel estimation method comprises:
- performing channel estimation on at least two fragments respectively to obtain CIRs of the at least two fragments, wherein the at least two fragments originate from a same MMS data packet;
- and
- integrating the channel impulse responses of the at least two fragments to obtain a channel impulse response of the MMS data packet.
Dependencies are inferred from the claim text.