Samsung Electronics Co., Ltd.

Suk-Jin Jung

Hyung-Jin Choi

Sung-Bae Cho

Hyung-Kil Lee

Byung-Tae Kang

Jun-Won Ko

Kyung-Hyun Paik

Channel estimation in a broadband wireless communication system is provided. A receiver includes a frequency interpolator for interpolating in a frequency axis using at least one of channel estimation values estimated through pilot signals and channel estimation values generated using a time-axis interpolation, a determiner for determining a compensation coefficient to compensate for edge distortion using the channel estimation values estimated through the pilot signals, and a compensator for generating a completed channel estimation value by multiplying a channel estimation value generated by interpolating in the frequency axis, by the compensation coefficient.

Apparatus and method for estimating a channel in a broadband wireless communication system

An apparatus and a method for deinterleaving using an inner memory and an outer memory. The apparatus includes data receiving apparatus of a mobile equipment in a mobile communication system including the mobile equipment and a base station for transmitting data to the mobile equipment through a radio channel. The apparatus includes a deinterleaving unit having a deinterleaver and an outer memory separately located with the deinterleaver. The deinterleaver stores address information including an address of the outer memory and values corresponding to the address of the outer memory in an inner memory. The outer memory stores the data to be deinterleaved, and a decoder for decoding the deinterleaved data.

Deinterleaving apparatus and method using inner memory and outer memory

A survivor memory device in a Viterbi decoder determines a final survivor path using a trellis diagram and decision vectors, and outputs decoded data corresponding to the determined survivor path. The survivor memory device includes a path existence information generator for receiving a plurality of decision vectors, and for generating first branch path existence information representing whether a branch path exists between each state and the corresponding next states in the trellis diagram. A plurality of units are serially connected with respect to the outputs of the path existence information generator. Each unit comprises a path existence information store for receiving and storing the first branch path existence information, a path removal signal generator for generating corresponding path removal signals when the first branch path existence information corresponding to each current state represents that corresponding branch paths do not exist between each current state and the corresponding next states, and a path existence information updator for receiving the first branch path existence information stored in the path existence information store and the path removal signals generated by the path removal signal generator, and for updating values of second branch path existence information corresponding to each current state to represent that corresponding branch paths do not exist between each current state and the corresponding previous states.

Survivor memory device in viterbi decoder using trace deletion method

A decoding apparatus for decoding input data using a Viterbi algorithm includes a first unit for repetitively performing determination of a survivor path corresponding to each state at each time unit based on the input data and a Trellis diagram, and for generating decision vectors and path number information whenever a branch path is determined. A second unit is provided for storing the decision vectors generated in the first unit and for outputting path information representing each survivor path determined by the stored decision vectors. A third unit stores the path number information output from the first unit and the path information output from the second unit, and deletes the branch path information corresponding to the path number information of the first unit from the stored path information, while retracing the previous states during the time when the branch path to be deleted does not overlap the other survivor path having a branch path connected to the next state. The third unit generates decoded data corresponding to input data based on the finally remaining survivor path.

Growing community of inventors

Gyeonggi-do, South Korea

Suk-Jin Jung