1004,West-CBD,No.139 Binhe Rd,Futian District,Shenzhen, China Post Code:518048
+86-18682200597
sales@szhaiwang.com
source:Industry News release time:2023-04-14 Hits: Popular:Infrared sensing module
1. Split the calculation: You can split any FIR calculation into its "pre-wrap" and "post-wrap" parts. By splitting the calculation into these two parts, you essentially can do the circular logic only once, rather than once per tap. (See fir_double_z in FirAlgs.c above.)
2. Duplicate the delay line: For a FIR with N taps, use a delay line of size 2N. Copy each sample to its proper location, as well as at location-plus-N. Therefore, the FIR calculation's MAC loop can be done on a flat buffer of N points, starting anywhere within the first set of N points. The second set of N delayed samples provides the "wrap around" comparable to a true circular buffer. (See fir_double_z in FirAlgs.c above.)
3. Duplicate the coefficients: This is similar to the above, except that the duplication occurs in terms of the coefficients, not the delay line. Compared to the previous method, this has a calculation advantage of not having to store each incoming sample twice, and it also has a memory advantage when the same coefficient set will be used on multiple delay lines. (See fir_double_h in FirAlgs.c above.)
4. Use block processing: In block processing, you use a delay line which is a multiple of the number of taps. You therefore only have to move the data once per block to implement the delay-line mechanism. When the block size becomes "large", the overhead of a moving the delay line once per block becomes negligible.
Read recommendations:
Pay attention to the details of the use of NTC temperature control switches
Popular Recommended Products
HW-M09 microwave sensor module
2021-12-07BISS0001
2021-11-27Φ7mm size
2021-11-27PIR Lens 7809
2021-12-09PIR Lens 8603-5
2021-12-0910.525G Radar Induction MCU QNF-24816
2024-03-22Z001
2021-11-27HW-11801630 Imaging Fresnel lens
2024-04-11PIR Lens 8801-1
2021-12-09HW806
2021-11-27PIR Lens 8003-2
2021-12-09NTC thermistor of NTC heat -sensitive resistance applied by the battery pack
2023-02-08High temperature resistance 300-350 degrees NTC thermistor.Body Sensor manufacturer
2022-09-15The Application of NTC Thermistor in Arm Type Intelligent Thermometer.Radar Microwave Induction Sens
2023-05-06How to build a simple PIR sports sensor
2022-10-10NTC heat dissipation coefficient.Led PIR Sensor wholesale
2022-06-25NTC temperature sensor for front cover of heater.Microwave Sensor Switch
2023-09-15Analysis of the characteristics of photoelectric switch of radio frequency sensor
2022-01-12The application of NTC thermistor in the fire alarm reporter.Smart Microwave Sensor switch company
2023-03-11Smart women's underwear suitable for NTC thermistor chip.Microwave Radar Sensor direct sales.Microwa
2022-08-12Analysis on the characteristics of three common human body sensing technologies
2022-11-21szhaiwang4@hotmail.com
+86-18682200597
sales@szhaiwang.com