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In digital signal processing, half-band filters are widely used for their efficiency in multi-rate applications. A half-band filter is a low-pass filter that reduces the maximum bandwidth of sampled data by a factor of 2 (one octave). When multiple octaves of reduction are needed, a cascade of half-band filters is common. And when the goal is downsampling, each half-band filter needs to compute only half as many output samples as input samples.
Low latency energy detection in a wireless communication network
PendingUS20260156677A1Power managementBaseband system detailsTelecommunicationsWireless transmission
Systems and techniques are provided for energy detection by a wireless communication device. A method includes filtering a received signal using a half-band (HB) filter with a configured cut-off frequency to obtain a filtered signal based on the received signal, wherein the HB filter is associated with a receiver of the wireless communication device, and the received signal comprises a wireless transmission received by the receiver. Information indicative of a power level can be determined corresponding to a detected energy associated with the filtered signal. Embodiments of the wireless communication device process the received signal according to the information indicative of the power level, before demodulated symbols become available from a receiver downsampling chain.
Owner:MORSE MICRO PTY LTD