Transceiver system with quantization noise mitigation
AssigneeApple Inc.
InventorsMichael Kerner, Zohar Agon, Michael Ney
Life of this patent
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Abstract
A transceiver having quantization noise compensation is disclosed. The transceiver includes transmitter and receiver circuits. The transmitter is configured to receive and quantize a digital signal to generate a quantized signal. The quantized signal is then converted into an analog transmit signal and transmitted as a wireless signal. The receiver circuit is configured to receive a reflected version of the wireless signal and generate an analog receive signal based thereon. The analog receive signal is converted into a digital receive signal. Thereafter, the receiver cancels quantization noise from the digital receive signal to produce a digital output signal that can be utilized for further processing.
Claims20
An apparatus, comprising:
- a transmitter circuit configured to:
- receive a digital transmit signal;
- quantize the digital transmit signal to generate a quantized signal;
- generate an analog transmit signal using the quantized signal;
- and
- transmit a wireless signal using the analog transmit signal;
- and a receiver circuit configured to:
- receive a reflected version of the wireless signal;
- generate an analog receive signal using the reflected version of the wireless signal;
- generate a digital receive signal using the analog receive signal;
- and
- cancel, using information based on the transmit digital signal and the quantized signal, quantization noise in the digital receive signal to generate a receive output signal, wherein the information based on the transmit digital signal includes a product of a first value of the digital transmit signal at a first time and a second value of the digital transmit signal at a second time, and wherein a difference between the first time and the second time corresponds to a time between transmission of the wireless signal and the receiving of the reflected version of the wireless signal.
A method comprising:
- quantizing a digital transmit signal to generate a quantized signal;
- generating an analog transmit signal based on the quantized signal;
- transmitting, from a transmitter circuit, a wireless signal based on the analog transmit signal;
- generating, in a receiver circuit, an analog receive signal based on a reflected version of the wireless signal;
- generating a digital receive signal based on the analog receive signal;
- and
- generating a receive output signal by canceling, using information corresponding to the transmit digital signal and the quantized signal, quantization noise from the digital receive signal, wherein the information corresponding to the transmit digital signal includes a product of a first value of the digital transmit signal at a first time and a second value of the digital transmit signal at a second time, and wherein a difference between the first time and the second time corresponds to a time between transmission of the wireless signal and the receiving of the reflected version of the wireless signal.
A system comprising:
- a transmitter configured to transmit a wireless signal, wherein the transmitter includes:
- a signal source configured to provide a transmit digital signal;
- a quantization circuit configured to generate a quantized signal based on the transmit digital signal;
- and
- a digital-to-analog converter (DAC) configured to generate an analog transmit signal based on the quantized signal, wherein the transmitter is configured to generate and transmit a wireless signal using the analog transmit signal;
- a receiver configured to receive a reflection of the wireless signal, the receiver including:
- an analog-to-digital converter (ADC) configured to generate a digital receive signal based on an analog receive signal, wherein the analog receive signal corresponds to the reflection of the wireless signal;
- and
- a compensation circuit coupled to receive information corresponding to the transmit digital signal and the quantized signal, and further coupled to receive digital receive signal, wherein the compensation circuit is configured to generate a receive output signal by compensating for quantization noise in the digital receive signal.
Dependencies are inferred from the claim text.