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waveform equalization
Vertaling van "waveform equalization" in Japans
It is possible to perform a highly accurate waveform equalization.
精度の高い波形等化を行う。
It is possible to provide a waveform equalization circuit which can realize a large-capacity communication and a high-rate communication.
本発明により、大容量通信、高速通信を実現しうる波形等化回路が提供される。
Thus, there can be provided an optical communication system wherein the propagation characteristics of an optical waveform equalization unit can be reconfigured simply and at a low cost, and without negatively affecting transmission quality.
これにより、伝送品質に悪影響を与えず、また簡便かつ低コストに光学的波形等化部の伝搬特性を再設定することができる光通信システムを提供する。
WAVEFORM EQUALIZATION CIRCUIT AND WAVEFORM EQUALIZATION METHOD
波形等化回路および波形等化方法
The equalization target value generating section determines a sign signal indicative of plus/minus of the signal subjected to waveform equalization for first through fifth times, and determines a value corresponding to the total sum of the sign signals for first through fifth times respectively multiplied by θ, β, a, β, θ (a, β, θ are predetermined real numbers) as an equalization target value.
The receiver device (111) receives and demodulates the transmitted packet, and carries out a waveform equalization process by detecting and correcting, on the basis of pre-logged known data, a waveform distortion which is included in the packet.
受信装置（１１１）は、送信されたパケットを受信して復調し、パケットに含まれる波形歪を、予め登録された既知データに基づいて検出して補正することにより波形等化処理を行う。
A waveform equalization controller comprising a waveform equalizer including a filter having a plurality of taps, updating the tap coefficient of the plurality of taps according to an inputted tap coefficient signal, inputting a plurality of sample values at different times of an input signals to the plurality of taps, respectively, and performing waveform equalization on the input signal to output it, an equalization target value generating section for determining an equalization target value, a section for estimating error between the equalization target value and a signal subjected to waveform equalization, and a coefficient update section for determining the coefficient update amount of each tap based on the error signal, and the input value for each tap of a filter in the waveform equalizer and outputting it as a tap coefficient signal.
The waveform equalization circuit includes: a judgment feedback equalization unit (101) which feedback-equalizes an input signal (100); a clock phase adjustment unit (102) which adjusts a clock phase of a signal (131) equalized by the judgment feedback equalization unit (101) according to a signal judged with a predetermined potential to be a threshold value; and a duo binary decoder (103) which encodes into a duo binary signal, the signal judged with a predetermined potential to be a threshold value according to a clock adjusted by the clock phase adjustment unit (102) from the signal equalized by the judgment feedback unit (101).
The nonlinear waveform equalizer (SEQ) comprises, for example, a FIR filter with four taps and performs nonlinear waveform equalization of an inputted digital signal so as to greatly amplify only the signal component having a small amplitude and a high frequency.
前記非線形波形等化器ＳＥＱは、例えば４タップのＦＩＲフィルタで構成されていて、小振幅で高周波数な信号成分のみを大きく増幅するように、入力ディジタル信号を非線形波形等化する。
WAVEFORM EQUALIZER CIRCUIT AND WAVEFORM EQUALIZATION METHOD
リニアイコライザ回路のＤＣゲインを、設定にしたがって容易かつ正確に制御できる波形等化回路を提供する。
An OFDM receiver apparatus for receiving and demodulating an OFDM signal carrying a pilot signal, comprising a transmission path characteristic estimating part for performing a calculation between the OFDM signal of frequency domain and the pilot signal to calculate a transmission path characteristic prior to interpolation, then performing the interpolation for the transmission path characteristic by use of a plurality of filters having their respective different characteristics, and then outputting, based on the interpolation results obtained by the plurality of filters, a plurality of transmission path characteristics as interpolated; an equalizing part for performing an waveform equalization for the OFDM signal of frequency domain by use of the plurality of transmission path characteristics as interpolated, and then outputting a plurality of demodulated signals based on the waveform equalization results corresponding to the respective ones of the plurality of transmission path characteristics as interpolated; a determining part for determining one of the plurality of demodulated signals that has the best quality and then outputting the determination result; and a selecting part for selecting, based on the determination result, one of the plurality of demodulated signals for output.
パイロット信号を伝送するＯＦＤＭ信号を受信し復調するＯＦＤＭ受信装置であって、周波数領域のＯＦＤＭ信号と前記パイロット信号との間の演算によって補間前の伝送路特性を算出し、前記補間前の伝送路特性に対して、互いに特性が異なる複数のフィルタによる補間を行い、前記複数のフィルタのそれぞれによって得られた補間結果に基づいて、複数の補間後の伝送路特性を出力する伝送路特性推定部と、前記複数の補間後の伝送路特性によって、前記周波数領域のＯＦＤＭ信号に対して波形等化を行い、前記複数の補間後の伝送路特性のそれぞれに対応した波形等化結果に基づいて、複数の復調信号を出力する等化部と、前記複数の復調信号の中から、品質が最も良好なものを判定し、判定結果を出力する判定部と、前記判定結果に従って、前記複数の復調信号の中から１つを選択して出力する選択部とを備える。
The OFDM reception device includes: a high-speed Fourier transform unit for converting the OFDM signal of the time region received into an OFDM signal of the frequency region; an equalizer for subjecting the OFDM signal of the frequency region to a waveform equalization and outputting the OFDM signal after the waveform equalization; and a modulation method estimation method for estimating the modulation method of these carriers according to the signal point of the carriers constituting the OFDM signal after the waveform equalization and outputting the obtained estimation result.
複数のキャリアで構成されたＯＦＤＭ信号を受信するＯＦＤＭ受信装置であって、受信された時間領域のＯＦＤＭ信号を周波数領域のＯＦＤＭ信号に変換して出力する高速フーリエ変換部と、前記周波数領域のＯＦＤＭ信号に対して波形等化を行い、波形等化後のＯＦＤＭ信号を出力する等化部と、前記波形等化後のＯＦＤＭ信号を構成する複数のキャリアの信号点に基づいて、これらのキャリアの変調方式を推定し、得られた推定結果を出力する変調方式推定部とを備える。
Andere resultaten
This digital optical transmitter is provided with a pre-equalization coefficient calculation means for generating a conversion function for compensating for a waveform distortion created in an optical modulator, a pre-equalization signal generation means for pre-equalizing first data and second data using the generated conversion function to output third data and fourth data, and an optical modulator.
Synoniemen voor waveform equalization in het Engels
Woord & uitdrukking van de dag
Afbeelding van de dag
Resultaten: 15. Exact: 12. Verstreken tijd: 25 ms.
