Samsung Electronics Co., Ltd.

Chung Ang University Industry Academic Cooperation

Myongji University

Tae-Gyu Chang

Heung-yeop Jang

Hyeon-Jin Jeon

Tanee Demeechai

Jee-Tae Park

A non-coherent detection apparatus includes, inter alia, a correlation unit, a frequency offset estimator, and a signal detector. The correlation unit obtains a differential phase signal by multiplying a complex conjugate value of a delay signal obtained by delaying a received signal by (N+1) chips by the received signal, sums-up resultant values obtained by multiplying each component of the differential phase signal by each component of a correlation sequence and outputs a correlation signal. The frequency offset estimator estimates a frequency offset based on a value obtained by accumulatively summing-up the correlation signals corresponding to preamble portions of the received signal. The signal detector detects an original signal from the received signal based on a size of a real-number part of a resultant value obtained by multiplying the frequency offset estimated by the frequency offset estimator by the correlation signal corresponding to a PHY payload portion of the received signal.

Non-coherent detection apparatus and method for IEEE 802.15.4 LR-WPAN BPSK receiver

A method and apparatus for shaping quantization noise generated when compressing audio data at a low bit rate is disclosed. A predetermined quantization noise threshold allowed during quantization of sampled audio data and quantization noise energy information of a quantized MDCT coefficient are received in all frequency bands of an audio frequency. The quantization noise energy of the quantized MDCT coefficient is attenuated in a predetermined number of frequency bands in which a difference between the predetermined quantization noise threshold and the quantization noise energy of the quantized MDCT coefficient is large.

Quantization noise shaping method and apparatus

The present invention relates to a data conversion method for providing efficient conversion between data of different unit lengths, a method for obtaining waveform information from a square wave using the same, and a method for generating the square wave from the waveform information using the same. According to the data conversion method of the present invention, there is an advantage in that data compression and data decompression can be readily and efficiently performed. Further, according to the method of obtaining the waveform information and the method of generating the square wave using the data conversion method of the present invention, there are advantages in that the waveform information can be efficiently generated from the square wave signal and the square wave signal can be efficiently generated from data on the waveform information of the square wave.

Data conversion method, method for obtaining waveform information from square wave using the same, and method for generating square wave from waveform information using the same

Growing community of inventors

Seoul, South Korea

Tae-Gyu Chang