Low-complexity FIR filter reconfigurable architecture based on secret bit information embedding system

A bit information, low-complexity technology, applied in impedance networks, digital technology networks, electrical components, etc., can solve problems such as reducing throughput bits, increasing hardware costs and system delays, and increasing coefficient multipliers to achieve optimal utilization. , easy to cascade, save hardware consumption effect

Pending Publication Date: 2021-03-26
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] (3) No degradation in throughput (bandwidth or bits per transfer)
This structure adds a large number of coefficient multipliers, which increases hardware cost and system delay

Method used

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  • Low-complexity FIR filter reconfigurable architecture based on secret bit information embedding system
  • Low-complexity FIR filter reconfigurable architecture based on secret bit information embedding system

Examples

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Embodiment Construction

[0036] The present invention will be further described below in conjunction with the accompanying drawings.

[0037] figure 1 It is a structural diagram of a reconfigurable new architecture of the low-complexity FIR filter based on the secret bit information embedding system of the present invention, including: a lookup table unit, a preprocessing unit, a processor unit, and a selection delay adding unit .

[0038] The lookup table unit performs 15-bit CSD encoding on the coefficient value of the 14-bit fixed-point decimal type, and further divides the 15-bit CSD into three CSs, namely the combination of [1 0 1], [1 0 -1] and [1]; And determine the sign of each CS, as the selection signal of the adder or subtracter; and record the shift situation of each CS. Finally, it is presented with the selector, the selection signal of the adder (subtractor), and the shift signal of the programmable shifter.

[0039] The main task of the preprocessing unit is to generate C i,j , C ...

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Abstract

The invention provides a low-complexity finite-length unit impulse response (FIR) filter reconfigurable new architecture based on a secret bit information embedding system. The FIR filter reconfigurable architecture is based on a transposed direct form FIR filter structure, and aims to reduce the area and time delay consumption of the reconfigurable FIR filter. The method comprises the following steps: firstly, carrying out regular symbolic coefficient (CSD) encoding on the magnitude of a coefficient, and further dividing the CSD into a combination of six sub-expressions (CS); replacing multiplication operation by sharing, selecting, shifting and adding (subtracting) of CS; and finally, connecting a previous tap and a next tap by using a selective delay addition (subtraction) unit to realize the reconfigurable FIR filter. According to the invention, the LUT consumption quantity is effectively reduced, and the system time delay is reduced.

Description

technical field [0001] The invention relates to the technical field of reconfigurable architecture of FIR filters, in particular to a reconfigurable architecture of low-complexity FIR filters based on secret bit information embedding system. Background technique [0002] In many applications, the sender transmits secret information in addition to data information to the receiver. Only designated recipients can obtain secret information, while other ordinary recipients can also normally receive data information. These secrets could be watermarks, certification labels, product IDs or spectrum licenses for Dynamic Spectrum Access. In these cases, the secret information should be embedded in the transmission process to better hide the secret information. Putting secret information on a separate channel defeats the purpose of watermarking. Therefore, usually secret information is embedded in the physical layer of the wireless communication system. This embedding process shoul...

Claims

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Application Information

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IPC IPC(8): H03H17/02
CPCH03H17/0223
Inventor 吴佩佩陈佳嘉
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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