摘要:
Provided is an scrambling or descrambling method and apparatus. The scrambling system includes a data stream generating unit to generate data streams, a scrambling linear feedback shift register (LFSR) group to calculate a sequence output with respect to each of the generated data streams, and a scrambling processing unit to perform scrambling of the generated data streams based on the calculated sequence outputs. The descrambling system includes a data stream generating unit to generate scrambled data streams using scrambled data, a descrambling LFSR group to calculate a sequence output of each of the generated scrambled data streams, and a descrambling processing unit to perform descrambling of the scrambled data streams using the calculated sequence outputs.
摘要:
Provided are a fixed station receiver for a Multi-Input Multi-Output (MIMO) communication system and an uplink adaptation method thereof. In the uplink adaptation method, a sounding reference signal (SRS) is received from a terminal including a plurality of transmission antennas. A complex channel matrix (H) corresponding to a channel response and a noise variance (σ2) corresponding to a noise power is calculated from the sounding reference signal. A signal-to-interference and noise ratio (SINR) on each transmission symbol is calculated with reference to the complex channel matrix (H) and the noise variance (σ2). A pre-coding matrix of the terminal is selected with reference to the signal-to-interference and noise ratio (SINR).
摘要:
Provided is a data transmission system for transmitting control information from a terminal to a base station. The terminal may multiplex the control information, and may transmit the multiplexed control information to the base station using a plurality of transmit antennas. The base station may receive the multiplexed control information and combine the control information. The base station may transmit data to the terminal using the control information.
摘要:
Provided is a decoding apparatus and method using orthogonal space-time block codes (OSTBCs) robust against timing errors. The decoding apparatus may include: a cyclic prefix removal unit to receive a signal, and to remove a cyclic prefix in the signal; an inverse discrete Fourier transform (IDFT) unit to apply an IDFT to the signal with the removed cyclic prefix; a guard band removal unit to remove a guard band in the inverse discrete Fourier transformed signal, and to generate a complex matrix; a channel estimation unit to transmit a carrier corresponding to the complex matrix and channel status information associated with transmit and receive antennas; and a decoder to calculate a channel status vector with respect to a complex symbol included in the complex matrix, using the channel status information, and to calculate an inner product between the channel status vector and the complex matrix, to restore the complex symbol.