This paper presents a power control structure for a brushless permanent magnet electric machine, where both generating and motoring operation modes using the same power stage coexist using a digital control scheme. In the generating mode, desired dynamic output such as constant power and constant torque can be achieved for use in an exercise bicycle, where the input power generated by pedaling ...

A recursive convolutional encoder can be regarded as an innite impulse response system over the Galois Field of order 2. First, in this paper, we introduce nite response input sequences for recursive convolutional codes that give nite weight output sequences. In practice, we often need to describe the nite response sequence with a certain Hamming weight. Then, di erent properties of nite respon...

21 st century is an era of wireless world. The cause of the current trend for wireless applications is the improved data rate for multifarious applications of communication. But during communication, the data might be distorted due to impairments of channels. Reduction of error due to noisy channels becomes critical. Novel high speed VLSI architecture for encoding Reed Solomon codes are present...

In order to meet the requirements of future wideband wireless communications, a parameter-configurable encoder architecture is proposed in this paper for QC-LDPC (QuasiCyclic Low-Density Parity-Check) codes with high throughput. Distinguished from normal encoder, a CPU-liked architecture including an application specific instruction set and a specialized arithmetic logic unit (ALU) as well as a...

In recent years, principal component analysis (PCA) has attracted great attention in image compression. However, since the compressed image data include both the transformation matrix (the eigenvectors) and the transformed coefficients, PCA cannot produce the same performance as DCT (discrete Cosine transform) in respect of compression ratio. In using DCT, we need only to preserve the coefficie...

Present paper deals with the simulation and implementation of two functional units, parse-to-shaping-frame and differential encoder, for spectral shaping in 56Kbps digital modem transmitter. The idea behind spectral shaping is to adapt the shape of the transmitted signal, to conform to the shape or spectral limitations of the channel, without changing the basic pulse shape or peak-to-average-ra...

The basic problem that we will be looking at can be described as follows and is illustrated in Figure 1. The overall objective (as usual) is to reliably communicate a message m ∈ {1, . . . , 2nR} from the encoder to the decoder using the channel n times. The largest rate R for which this is possible is called the capacity of the channel. The channel that we can use is described by a conditional...

Block matching motion estimation is the essence of video coding systems. Therefore, development of an efficient method for fast motion estimation is the basic requirement of the video encoder design. Block based motion estimation algorithms are used to reduce the memory requirements of any video file and also decrease computational complexity. We have been presented here some block matching alg...