Invention Grant
- Patent Title: Fixed point FIR filter with adaptive truncation and clipping and wireless mobile station using same
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Application No.: US13190439Application Date: 2011-07-25
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Publication No.: US08275341B2Publication Date: 2012-09-25
- Inventor: Tao Zhang
- Applicant: Tao Zhang
- Applicant Address: US CA Santa Clara
- Assignee: National Semiconductor Corporation
- Current Assignee: National Semiconductor Corporation
- Current Assignee Address: US CA Santa Clara
- Agent Andrew S. Viger; Wade J. Brady, III; Frederick J. Telecky, Jr.
- Main IPC: H04B1/10
- IPC: H04B1/10 ; H04L27/08

Abstract:
A fixed point finite impulse response (FIR) filter comprising: 1) an input stage for receiving an input signal as a sequence of input samples comprising: i) delay elements connected in series for receiving and shifting N sequential input samples; ii) multipliers, each multiplier receiving a selected one of the N sequential input samples from the delay elements and multiplying the selected input sample by a corresponding coefficient to produce an intermediate product; and iii) a summer for receiving and adding N intermediate products from the multipliers to produce an output sum signal comprising a sequence of output sum samples; and 2) an output stage for truncating k least significant bits (LSBs) from each of the output sum samples, wherein k is a variable number.
Public/Granted literature
- US20120020441A1 FIXED POINT FIR FILTER WITH ADAPTIVE TRUNCATION AND CLIPPING AND WIRELESS MOBILE STATION USING SAME Public/Granted day:2012-01-26
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