Abstract: A signal converter having a memory bank and radix-2 Fast Fourier Transform (FFT) transforms an Orthogonal Frequency Division Multiplexing (OFDM) signal having a long preamble and data into an OFDM signal in the frequency domain, and outputs the transformed OFDM signal. The radix-2 FFT has a linear systolic array architecture, transforms the long preamble stored in the memory bank by FFT, then stores the transformed long preamble into the memory bank, transforms data input through a buffering process and data input directly by FFT, and stores the transformed data in the memory bank. The memory bank has four memories, stores the long preamble transformed or not transformed and outputs the stored long preambles or the transformed data for the purpose of demodulation as the transformed data is input. Data-processing delay and/or power consumption may be reduced during the operation of the FFT processor.

Abstract: A physical layer unit (PLU) for receiving (and transmitting) various signals, a wireless Local Area Network (LAN) system including the PLU, and a wireless LAN method using the wireless LAN system. The wireless LAN system is capable of receiving signals of different standards, by performing a first preamble processing of an input signal for a predetermined first time period of 16 ?s (the preamble processing time period according to an OFDM standard for determining whether the input signal corresponds to the OFDM standard), and performing a second preamble processing within a predetermined second time period (the remainder of a preamble processing time period for determining whether the input signal corresponds to a DSSS/CCK standard), if the input signal does not correspond to the OFDM standard. Therefore, DSSS/CCK and OFDM signals can be transmitted and received reliably in the integrated wireless LAN system according to the IEEE 802.11.g standard.

Abstract: A combined DVD/CD (Digital Video Disk/Compact Disk) data processor used in a DVD/CD player.

Abstract: Orthogonal frequency division multiplexing (OFDM) transmitting and receiving apparatus and methods can extend a communication distance by duplicated transmission of symbols in multiple channels. An input OFDM data bitstream is encoded to generate a symbol stream. The symbol stream is copied into multiple symbol streams and converted into data complex symbol streams by a modulation method. An input pilot bitstream is converted into a pilot complex symbol stream, and the pilot complex symbol stream is inserted into the data complex symbol streams to generate transmission symbol streams. Fast Fourier transform (FFT) processing of the transmission symbol streams is performed. Guard intervals (GIs) are inserted into the FFT processed signals. The signals are converted into analog signals, loaded onto carriers and transmitted.

Abstract: A physical layer unit (PLU) for receiving (and transmitting) various signals, a wireless Local Area Network (LAN) system including the PLU, and a wireless LAN method using the wireless LAN system. The wireless LAN system is capable of receiving signals of different standards, by performing a first preamble processing of an input signal for a predetermined first time period of 16 &mgr;s (the preamble processing time period according to an OFDM standard for determining whether the input signal corresponds to the OFDM standard), and performing a second preamble processing within a predetermined second time period (the remainder of a preamble processing time period for determining whether the input signal corresponds to a DSSS/CCK standard), if the input signal does not correspond to the OFDM standard. Therefore, DSSS/CCK and OFDM signals can be transmitted and received reliably in the integrated wireless LAN system according to the IEEE 802.11.g standard.

Abstract: A signal converter having a memory bank and radix-2 Fast Fourier Transform (FFT) transforms an Orthogonal Frequency Division Multiplexing (OFDM) signal having a long preamble and data into an OFDM signal in the frequency domain, and outputs the transformed OFDM signal. The radix-2 FFT has a linear systolic array architecture, transforms the long preamble stored in the memory bank by FFT, then stores the transformed long preamble into the memory bank, transforms data input through a buffering process and data input directly by FFT, and stores the transformed data in the memory bank. The memory bank has four memories, stores the long preamble transformed or not transformed and outputs the stored long preambles or the transformed data for the purpose of demodulation as the transformed data is input. Data-processing delay and/or power consumption may be reduced during the operation of the FFT processor.

Abstract: A combined DVD/CD (Digital Video Disk/Compact Disk) data processor used in a DVD/CD player.

Abstract: Remote control access over certain electronic devices through computer networks is disclosed. Particularly, an internet protocol (IP) interfacing apparatus for controlling non IP-based network devices with IP-based network devices and a method therefor is disclosed. The IP interfacing apparatus according to the present invention includes a dynamic home page assisting section for collecting information on the predetermined electronic devices to assist in construction and processing of a dynamic home page in accordance with assistance in construction of a dynamic web server, and a function control converting section for converting a function control demand by the IP-based networks to a function control of the non IP-based networks by converting a predetermined function selected through HTTP in said IP-based networks to a control command in said non IP-based network.