公开(公告)号：EP0920757B1

公开(公告)日：2005-04-06

申请号：EP97944237.3

申请日：1997-09-19

申请人： Telefonaktiebolaget LM Ericsson (publ)

发明人： SIGNELL, Svante ,  SCHIER, Thorsten

IPC分类号： H04L5/06 ,  H04J1/05 ,  H03H17/02

CPC分类号： H04J1/05 ,  H03H17/0202 ,  H04L5/06

公开(公告)号：EP0868795A4

公开(公告)日：2000-04-19

申请号：EP96945238

申请日：1996-12-19

申请人： INTEL CORP

发明人： ANDERSEN DAVID B ,  JOHNSON DAVID B ,  KINI VITTAL

IPC分类号： H04J1/05 ,  H04N7/173

CPC分类号： H04J1/05

摘要： A frequency division multiplexed coupler (401) for multiplexing a plurality of signals onto a single telephone wire (636) is disclosed. The frequency division multiplexed coupler (401) comprises a first modulating unit (621) for modulating a frequency of a first outgoing signal to a first modulated signal having a frequency range corresponding to a first carrier signal (601). The frequency division multiplexed coupler (401) further comprises a second modulating unit (622) for modulating a frequency of a second outgoing signal to a second modulated signal having a frequency range corresponding to a second carrier signal (602). A frequency multiplexer (635) is coupled to the first modulating unit (621) and the second modulating unit (622) for multiplexing the first modulated signal and the second modulated signal onto a single telephone wire (636) for transmission to a remote site.

公开(公告)号：EP0800737A1

公开(公告)日：1997-10-15

申请号：EP95944265.0

申请日：1995-12-28

申请人： MOTOROLA, INC.

发明人： LUREY, Daniel, Morris ,  ROTTINGHAUS, Alan, P. ,  RADER, Sheila, Marie ,  LUZ, Yuda, Yehuda ,  SMITH, Paul, Fielding ,  SMITH, John, M. ,  PINCKLEY, Danny, Thomas ,  LAIRD, Kevin, Michael ,  KOBRINETZ, Tony ,  ELDER, Robert, C. ,  BAILEY, Donald, E.

IPC分类号： H04L27 ,  H01Q1 ,  H01Q3 ,  H03M1 ,  H04B1 ,  H04B7 ,  H04J1 ,  H04L1 ,  H04L25 ,  H03D3 ,  H04W88

CPC分类号： H04B7/0691 ,  H01Q1/246 ,  H01Q3/2605 ,  H03D3/006 ,  H03M1/121 ,  H04B1/0003 ,  H04B1/001 ,  H04B1/0032 ,  H04B1/26 ,  H04B1/28 ,  H04B7/06 ,  H04B7/0802 ,  H04B7/0874 ,  H04B7/24 ,  H04J1/05 ,  H04L1/06 ,  H04L1/22 ,  H04L25/14 ,  H04L27/2647 ,  H04W88/08

摘要： A digital receiver (200) and a transmitter (300), wherein the digital receiver includes a plurality of antennas (202) for receiving uplink radio frequency signals; a plurality of analog to digital converters (210) for converting the received radio frequency signals into digital signals; a switched digital down converter (214) for down converting one of the digital signals to a baseband IF signal; and a channel processor (228) for recovering one of a plurality of communication channels contained within the baseband IF signal.

公开(公告)号：EP0735673A1

公开(公告)日：1996-10-02

申请号：EP96101638.3

申请日：1996-02-06

申请人： ANT Nachrichtentechnik GmbH

发明人： Goeckler, Heinz, Dr.

IPC分类号： H03H17/06 ,  H03H17/02

CPC分类号： H03H17/02 ,  H04J1/05

摘要： Bei einer digitalen Filtereinrichtung werden mehrere gleichartige FIR-Filterbausteine (UD1,...,UD3) verwendet. Diese Filterbausteine dienen zur Dezimation und Aufspaltung in Teilspektren ( H 0 , H 1 ).
Abgesehen vom Filtereingangsbaustein (UD1) werden nur jene Filterausgänge beschaltet, deren Signale nacheinander mit zueinander unterschiedlichen Filterfunktionen beaufschlagt wurden.
Diese Filtereinrichtung eignet sich insbesondere zum Demultiplexen von FDM-Signalen bzw. zum Multiplexen in transponierter Anordnung.

摘要翻译： 在一个数字滤波器装置使用的多个相同的FIR滤波器块（UD1，...，UD3）的。 这些过滤装置用于抽取和分裂成子谱（H0，H1）。 除了过滤器的输入装置（UD1）只有那些滤波器输出端被连接，其信号用相互不同的过滤器功能的连续施加。 该过滤器装置特别适合用于解复用FDM信号或用于转置组件的复用。

公开(公告)号：EP0726000A1

公开(公告)日：1996-08-14

申请号：EP94930807.0

申请日：1994-10-18

申请人： AIRNET COMMUNICATIONS CORP.

发明人： CARNEY, Ronald, R. ,  WILLIAMS, Terry, L.

IPC分类号： H03H17 ,  H04B1 ,  H04B7 ,  H04J1 ,  H04J11 ,  H04L5 ,  H04L27 ,  H04W88

CPC分类号： H04L5/06 ,  H04B1/38 ,  H04J1/05 ,  H04L27/0004 ,  H04L27/2631 ,  H04L27/2652 ,  H04W88/08

摘要： A physically compact, multichannel wireless communication transceiver architecture employs overlap and add or polyphase signal processing functionality, previously applied to narrowband speech analysis research, for wideband signal processing. A receiver section receives a plurality of multiple frequency communication channels and outputs digital signals representative of the contents of the plurality of multiple frequency communication channels. The receiver section contains an FFT-based channelizer that processes the digital signals output by a wideband digital receiver and couples respective channel outputs to a first plurality of digital signal processor units, which process (e.g. demodulate) respective ones of the digital channel signals and supply processed ones of the digital channel signals at respective output ports for distribution to an attendant voice/data network. On the transmit side, a transmit section contains a plurality of digital signal processors, respectively associated with respective ones of a plurality of incoming (voice/data) communication signals to be transmitted over respectively different frequency channels. Their processed (modulated, encoded) outputs are supplied to an inverse FFT combiner. The FFT combiner supplies a combined multichannel signal to a wideband transmitter which transmits a multiple frequency communication channel signal. Each of the channelizer and combiner may be implemented using overlap and add or polyphase filtering.

公开(公告)号：EP0695054A2

公开(公告)日：1996-01-31

申请号：EP95305004.4

申请日：1995-07-17

申请人： MMS SPACE SYSTEMS LIMITED

发明人： Wishart, Alexander Walker ,  Cornfield, Paul Simon

IPC分类号： H04L5/06

CPC分类号： H04J1/05

摘要： A digital signal processing apparatus for frequency multiplexing and demultiplexing of narrow band FDM signals has a first block fine processing stage (11) connected in series to a first block coarse processing stage (16, 17) and in parallel therewith a second block fine processing stage (11a) connected in series to a second block coarse processing stage (16, 17). The two stages 11 and 11a are coupled together at one side remote from the two coarse processing stages (16, 17) to provide a first port (14) and the stages (16 and 17) at the side remote from the port (14) provide a plurality of ports (15). Each stage (11, 11a) is a FIR lowpass filter and each stage (16, 17) incorporates a polyphase filter (16) in connection with a Fast Fourier Transform Unit (17).

摘要翻译： 用于频带复用和解复用窄带FDM信号的数字信号处理装置具有与第一块粗处理级（16,17）串联连接的第一块精细处理级（11），并且与第二块精细处理级 （11a），其串联连接到第二块粗加工台（16,17）。 两级11和11a在远离两个粗加工级（16,17）的一侧耦合在一起，以便在远离端口（14）的一侧提供第一端口（14）和级（16和17） 提供多个端口（15）。 每个级（11,11a）是FIR低通滤波器，并且每个级（16,17）包括与快速傅立叶变换单元（17）相关联的多相滤波器（16）。 $$

公开(公告)号：EP0651527A2

公开(公告)日：1995-05-03

申请号：EP94115313.2

申请日：1994-09-29

申请人： ROBERT BOSCH GMBH

发明人： Göckler, Heinz, Dr. ,  Grotz, Karlheinz ,  Süssmeier, Georg

IPC分类号： H04J1/05

CPC分类号： H04N7/22 ,  H04J1/05

摘要： Verfahren zur Erzeugung eines FDM-Signals hoher Kanalzahl für Übertragungszwecke in Rundfunk- und Fernseh-Verteilsystemen, wobei die mit einer einheitlichen Abtastrate abgetasteten und digitalisierten Kanalsignale jeweils in interpolierenden digitalen Frequenzumsetzern unter Erhöhung der Abtastrate frequenzumgesetzt und mittels eines Addierers zusammengefaßt werden und wobei mehrere dieser so erzeugten Signale zu dem FDM-Signal zusammengefaßt werden, dadurch gekennzeichnet, daß die frequenzumgesetzten und mittels eines Addierers zusammengefaßten Signale komplexwertige Signale sind, welche in einer zweiten Stufe mittels Filter mit komplexwertigen Koeffizienten unter weiterer Erhöhung der Abtastrate frequenzumgesetzt und in reelle Signale umgewandelt werden, welche mittels eines reellen Addierers zu dem FDM-Signal zusammengefaßt werden.
Einsatz in einem Rundfunk und Fernsehverteilsystem, insbesondere über Glasfaser.
Erlaubt hohe Kanalzahl bei extrem hohen Abtastfrequenzen am Ausgang.

摘要翻译： 一种用于生产FDM信号高数目在广播和电视分配系统用于传输目的信道的方法，所述以均匀的采样速率和数字化的信道信号扫描各自频率转换中通过增加采样率内插的数字频率转换器和由加法器和多个这些所谓的组合 信号被组合以形成FDM信号，其特征在于，所述频率变换和组合由加法器信号是复值信号，这些信号频率转换通过具有复系数滤波器装置在第二阶段中，与在采样率进一步增加，并转换成实信号，其 由实加法器，将FDM信号的装置相结合。 使用在广播电视分配系统，特别是玻璃纤维。 在允许在输出极高的采样速率高通道数。

公开(公告)号：EP0501690A2

公开(公告)日：1992-09-02

申请号：EP92301462.5

申请日：1992-02-21

申请人： Matra Marconi Space UK Limited

发明人： Wishart, Alexander Walker ,  Lake, Francis Julian ,  Marston, Paul Christopher

IPC分类号： H03H17/02 ,  H04B7/185

CPC分类号： H04B7/18515 ,  H03H17/0266 ,  H04J1/05

摘要： Apparatus for and a method of digital signal processing utilises a technique known as sub-band decomposition and reconstruction. A plurality of input channels are provided each of which is mixed with a vernier frequency correction. In a multiplexer implementation, an FFT weighted overlap-add demultiplexer (c) is provided for decomposing each input channel into sub-bands. The sub-band outputs are decimated by a factor (d) to the common input sampling rate of a multiplexer, the sub-bands from each channel then being passed into the appropriate ports of an FFT weighted overlap-add multiplexer (f) by means of a switch matrix (e). The multiplexer (f) reconstructs the individual channels, interpolates each channel up to the output sampling rate of the FDT signal, mixes each channel up to its assigned carrier frequency in the FDM and multiplexes the channels. This provides a computationally efficient architecture with the flexibility to accommodate channels of differing bandwidths.

摘要翻译： 数字信号处理的装置和方法利用称为子带分解和重建的技术。 提供了多个输入通道，每个输入通道与游标频率校正混合。 在多路复用器实现中，提供FFT加权重叠加法解复用器（c），用于将每个输入信道分解成子带。 子带输出通过多路复用器的公共输入采样率的因子（d）抽取，然后每个信道的子带通过装置传送到FFT加权重叠加法多路复用器（f）的适当端口 的开关矩阵（e）。 多路复用器（f）重建各个通道，将每个通道内插直到FDT信号的输出采样速率，将每个通道混合到FDM中分配的载波频率，并复用通道。 这提供了一种具有计算效率的架构，具有适应不同带宽信道的灵活性。

公开(公告)号：EP0280161A3

公开(公告)日：1990-12-12

申请号：EP88102241.2

申请日：1988-02-16

申请人： NEC CORPORATION

发明人： Ichiyoshi, Osamu

IPC分类号： H01J1/05 ,  H04J4/00

CPC分类号： H04J1/05 ,  H03H17/0213

摘要： An N-channel FDM signal is converted into complex signals of baseband frequencies (1-6) spaced at intervals equal to frequency Δf. The complex baseband signals are converted first into digital samples (7-9)having a frequency NΔf and then into N parallel digital signals (11). A plurality of first FIR subfilters (17-1 through 17-N) respectively perform filtering on each of the parallel digital signals at frequency Δf to produce a first series of filtered digital signals from each of the first FIR subfilters, and (m - 1) groups of second FIR subfilters respectively perform filtering on each of the parallel digital signals at frequency Δf to produce a second series of filtered digital samples from each of the second FIR subfilters at timing displaced with respect to the first series by a/mΔf, where is an integer ranging from unity to (m - 1) and m is an integer equal to or greater than 2. Outputs of the first FIR subfilters are combined with outputs of the second FIR subfilters to produce N summation outputs at frequency mΔf. An N-point Fast Fourier Transform processor (14) performs fast Fourier transform on the N summation outputs at frequency mΔf to derive digital channels. Because of the oversampling at frequency mΔf, each of the digital channels has a frequency response which can be made flat over the bandwidth Δf.

公开(公告)号：EP0807344B1

公开(公告)日：2008-04-02

申请号：EP96905283.6

申请日：1996-01-29

申请人： Ericsson Inc.

发明人： JONES, Mark, A.

IPC分类号： H04J1/05 ,  H04L5/06 ,  H04L27/36

CPC分类号： H04L27/362 ,  H04J1/05 ,  H04L5/06

摘要： A transmitter includes a combiner (102) for combining plural data signal sets (I1, Q1; I2, Q2) into a single set of data signals (I', Q'). An I/Q modulator (106) modulates the single sets of data signals onto for example an intermediate frequency (IF) carrier signal. A frequency upconverter converts the frequency of the IF signal to a radio frequency signal which, when amplified in a power amplifier, is transmitted via antenna. Using the present invention, plural sets of quadrature modulated signals separated in frequency are transmitted on a single RF carrier rather than on two carriers.