CN1714499A - Apparatus and method for wideband signal processing - Google Patents

Apparatus and method for wideband signal processing Download PDF

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Publication number
CN1714499A
CN1714499A CN 200380103933 CN200380103933A CN1714499A CN 1714499 A CN1714499 A CN 1714499A CN 200380103933 CN200380103933 CN 200380103933 CN 200380103933 A CN200380103933 A CN 200380103933A CN 1714499 A CN1714499 A CN 1714499A
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signal
component
electromagnetic wave
channel
input signal
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戴维·本特森
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M/a-Com
MA Com Inc
Pine Valley Investments Inc
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    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
    • H03F3/20—Power amplifiers, e.g. Class B amplifiers, Class C amplifiers
    • H03F3/24—Power amplifiers, e.g. Class B amplifiers, Class C amplifiers of transmitter output stages
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F2200/00—Indexing scheme relating to amplifiers
    • H03F2200/331—Sigma delta modulation being used in an amplifying circuit

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Transmitters (AREA)

Abstract

An apparatus for electromagnetic processing comprises a modulator for generating one or more elements representative of an input signal; a divider controlled by the one or more elements and receiving an electromagnetic wave to generate a modified signal; a comparator for comparing the modified signal to a reference signal and for generating a processed signal based upon the comparison; and a channel number calculator for selecting a channel for the processed signal, wherein the input signal incorporates the channel selection.

Description

The apparatus and method that are used for The Wideband Signal Processing
Technical field
The present invention relates generally to Electromagnetic Treatment, particularly The Wideband Signal Processing.
Background technology
Electromagnetic wave is used to many different purposes with signal (hereinafter referred to as " ripple ").For example, can handle with transmission information, for example by reducing and/or amplify electromagnetic characteristic, as what when amplitude, frequency or the phase place of electric current or radio frequency (RF) ripple being modulated, seen with the transmission data to electromagnetic wave.As another example, by reducing and/or amplify electromagnetic characteristic, can transmit energy in a controlled manner, as what when the voltage and current in the circuit is modulated, seen along ripple.And, these purposes can be made up, for example when can be transmit information the time through ripple by power characteristic is handled.
Electromagnetic characteristics is handled and can be realized by numeral or analogue technique.Numeral and analog attenuation and/or amplification also can be made up, and in other words, in a system, can carry out various types of numerals and/or analog attenuation and/or amplify wanting to realize of task identical ripple.
Yet handling electromagnetic characteristics may be difficult to.For example, because several reasons selects suitable technology or device may be difficult to the characteristic of revising ripple.One of these reasons comprise the ripple type that will revise.For example, low frequency wave, as the 60Hz power waves, the treatment technology that needs may be different from the high frequency waves as the 24GHz radar wave.So use different components for different ripples usually with different qualities.For example, the Power Processing characteristic that the switching semiconductor that is used for the 60Hz power waves that uses in computer has is different from the power semiconductor that the 24GHz radar system is used.
Be to use the characteristic of ripple as the information of revising ripple in a trial of most recently used technology and device being carried out in the standardization.For example, by ripple being changed into polar coordinates, thereby can use and/or control any one or two characteristics provide standardized technique for various wave frequencies with amplitude and phase characteristic.Yet this so far trial is subjected to the constraint of application difficult.For example, use the trial of a plurality of amplifiers to suffer the difficulty of incident amplifier combination.Specifically, the device that use such as converter or quarter-wave line are the same adds up the output of amplifier to drive load.These devices have increased the cost and the size of amplifier array.
Therefore, electromagnetic wave provides efficiently and the while accurate technique will help the Electromagnetic Treatment technology in order to handle.
Summary of the invention
Embodiments of the invention comprise the product of device, method and the manufacturing of handling electromagnetic wave and signal.In one embodiment, provide a kind of device that electromagnetic wave is handled that is used for, it comprises: modulator is used to produce one or more compositions of representing input signal; Frequency divider is by described one or more Composition Control and receive electromagnetic wave to produce the signal of having revised; Comparator, signal that is used for having revised more and reference signal and the signal of having handled based on described relatively generation; With number of channel calculator, be used to the signal selective channel of having handled, wherein said input signal comprises the channel selection.
In another embodiment, provide the phase component signal is carried out the method that handle in the broadband, it comprises: be used to produce one or more compositions of representing input signal; Based on described one or more compositions electromagnetic wave is carried out frequency division to produce the signal of having revised; More described signal of having revised and reference signal; And based on the described signal of having handled that relatively produces.
Description of drawings
Fig. 1 is the block diagram that exemplary transmitter is shown.
Fig. 2 is the block diagram that the embodiment of the wideband modulator of using in the transmitter of Fig. 1 is shown.
Fig. 3 is the schematic illustrations that the embodiment of increment summation (sigma-delta) modulator that uses in the wideband modulator of Fig. 2 is shown.
Fig. 4 is the schematic illustrations that another embodiment of the increment summation modulator that uses in the wideband modulator of Fig. 2 is shown.
Embodiment
Embodiments of the invention comprise the product of device, method and the manufacturing of handling electromagnetic wave and signal.In order to illustrate, exemplary embodiment comprises the wideband modulator that is suitable for handling electromagnetic wave and signal.Wideband modulator disclosed herein can be implemented in very wide range of application, for example, and transmitter, receiver, converter etc.In order to illustrate, exemplary transmitter is disclosed among Fig. 1, wherein added according to the present invention
The wideband modulator of embodiment.
Exemplary transmitter 10 shown in Figure 1 can comprise: for example, baseband processor 100, amplitude/phase signal processor 101, wideband modulator 102, the self adaptation phase place that is suitable for receiving inputted signal aimed at device 103, power amplifier 104 again and is connected to one or more load line 105 of antenna.The details of transmitter 10 and its various parts will be described in more detail below.
Here employed vocabulary " signal " should be interpreted as to comprise from an any way to another place's Data transmission widely, for example, electric current or electromagnetic field, it includes but not limited to connect with the direct current that cuts off or exchanges or comprise the electromagnetic carrier of one or more data flow.For example, data can be added on current-carrying or the carrier wave by the means of modulation, can realize with the form of simulation or numeral.Here employed vocabulary " data " also should extensively be interpreted as information or the out of Memory that comprises any kind, such as but not limited to audio frequency for example sound, text and/or video etc.
As shown in Figure 1, baseband processor 100 can comprise digital signal processor in the present embodiment, for example, in response to for example being the input signal of baseband signal, can produce the digital signal processor of power control signal and data controlling signal.Along with following more detailed description, can regulate electrical power to produce the output signal that is used to transmit by data controlling signal as the input signal that amplifies.
The data controlling signal that is produced by baseband processor 100 comprises the electromagnetic wave that comprises the data that obtain from input signal in the present embodiment.Data controlling signal is transferred to amplitude/phase signal processor 101 from baseband processor 100.
In one embodiment, I, Q data by baseband processor 100 convert to the polar coordinates signal comprise with generation input signal amplitude wave property am simulation or numerical data control signal and comprise the electromagnetic signal of phase of input signals wave property ap.For example, can use rectangular coordinate to arrive the next form output stage coordinate of polar converter with R, P (sin) and P (cos).R coordinate representation wave amplitude characteristic.The phase characteristic of P (sin) and the oscillography of P (cos) coordinates table.
Then, the amplitude of input signal and phase characteristic can be sent to power amplifier 104 in the path through separating.The amplitude characteristic of primary signal can be modulated to the digit pulse string that comprises numeric word, numeric word is quantized into has the bit B of highest significant position to least significant bit 0To B N-1, numeric word length in various embodiments can change.
Successively, phase characteristic can separately be handled, and applies it to power amplifier 104 then.Fig. 2 illustrates a kind of exemplary approach of handling phase characteristic.Fig. 2 is shown specifically signal processor 101, wideband modulator 102 and the self adaptation phase place exemplary embodiment of aligner 103 again that is used for Fig. 1.
In the present embodiment, at first preferably by scale of data processor 120, its amplitude to data-signal is correctly calibrated from the phase of input signals data.Variation in the signal amplitude that is produced by scale of data processor 120 is calculated with compensation from any gain in the output signal of wideband modulator 102.Can be by finishing calibration to signal with the compatible mutually any traditional means of data format, for example, in a preferred embodiment, phase data signal be numeral and calibration can finish by digital processing.In the present embodiment, wideband modulator 102 is frequency modulator in essence, thus the conversion of carrying out data according to d θ/dt shown in Figure 2 123 for the expression of data frequency and phase place.
Phase component signal calculates so that it has as the closed loop response of wideband modulator 102 contrary amplitude and phase response this filter preferably by modulation compensated (equilibrium) filter 121 then.As will be discussed, in some cases, modulator 102 have design in the bandwidth of inside so that the minimum in the signal.Yet limiting bandwidth may cause the decline of signal higher frequency components by this way, i.e. decay.Equalization filter 121 and total modulated response filter 122 come compensate for attenuation by the gain that increases these higher frequency components, therefore produce the frequency response of more smooth (smoothly) for system, and have expanded the modulation bandwidth of wideband modulator 102 effectively.By using digital signal processor, equalization filter 121 preferably realizes with digital form, but is not limited thereto, and as an example, equalization filter 121 can be FIR (finite impulse response) or IIR (infinite frequency response) filter.Phase component data also can be passed through total modulated response filter 122, and this filter is calculated so that total passband response (as 4MHz) of wideband modulator 102 to be set.Similar with equalization filter 121, total modulated response filter 122 can be simulation or digital FIR or iir filter.On function, filter 121 and 122 can be combined into needed traffic filter.
In the present embodiment, base-band input signal can be modulated on the carrier wave of the centre frequency of in wideband modulator 102, selecting.Determine that by channel calculation given signal will be modulated onto the centre frequency on it, make carrier frequency (as 1880MHz) think that divided by the frequency of reference source signal sets up channel by channel calculation.
In the present embodiment, channel calculation produces the number with integer part and fractional part.As shown in Figure 2, channel calculator 124 is from baseband processor 100 receive channel numbers, and determine a selectable non-integer (non-whole number), with the carrier wave of this non-integer except that wideband modulator 102, the channel that allows selection to modulate with phase data signal.As the explanation of channel calculation procedure, suppose that with carrier frequency 1880MHz be example, so owing to determine that from reference frequency this number can be 23.5 to 24.5.The fractional part that should count and data-signal combination then, the signal after the combination is passed to the increment summation modulator (SDM) 125 in the wideband modulator 102.SDM 125 links to each other with phase-locked loop (PLL) 126 and uses to realize utilizing input signal wide-band modulation carrier wave.SDM 125 is used to make the phase data randomization of input and it is carried out over-sampling, makes the mean value of a plurality of samplings of output equal input.The mode of SDM 125 work in the present embodiment is that the inside quantizing noise from digitized process is carried out frequency shaping, thereby at desired frequency place, low noise.
SDM 125 can comprise, for example a series of adder and feedback device are used to import decimal phases/channels logarithmic data (it can be simulation or digital signal) and output and equal the digitized integer series that decimal is imported.SDM 125 preferably is configured to such mode to make input range is enough to the fractional part of the phase modulation data and the number of channel in the present embodiment.In one exemplary embodiment, SDM 125 is one 3 bit system, therefore it can produce 8 different output numerals (as-3 ,-2 ,-1,0,1,2,3 and 4), but should be appreciated that SDM 125 can comprise any bit or element of wanting number in another embodiment.In the present embodiment, SDM 125 is preferably each input sample and produces 4 output integers, thereby has produced the over-sampling rate that is four times in input.In SDM 125, may introduce noise to input modulating signal to the sampling of input modulating data by this way.Any such noise can be filtered by the low-pass loop filter among the PLL 126 131.Fig. 3 and Fig. 4 illustrate two kinds of exemplary circuit topologies of SDM125.Fig. 3 illustrates MASH III topology, and Fig. 4 illustrates third order PLL road topology.Yet, should be appreciated that under the situation of needs other circuit topology that is fit to also can be used for SDM125.
The output of SDM 125 is in the present embodiment combined with the integer part of the number of channel that receives from channel calculator 124 then.Here in the example of Tao Luning, this combination will produce the number between 20 to 28.The combination of the decimal of the number of channel and integer part in the present embodiment is imported in the frequency divider 128, and is used for PLL 126 is locked into the RF carrier wave of expectation.
In the present embodiment, preferably use PLL 126 so that utilize phase of input signals partly to modulate by RF carrier signal source, as carrier source 129, synthetic carrier signal.Carrier source 129 can be any electromagnetic wave source that can produce carrier wave, for example RF Voltage-Controlled Oscillator (VCO).
As shown in Figure 2, in the present embodiment, the frequency (perhaps by the frequency division of certain number to it) of reference source 127 output frequency with carrier source 129 is compared, and its frequency is carried out frequency division by frequency divider 128 from a series of numbers that SDM 125 and channel calculator 124 receive.Reference source 127 can comprise the VCO of fixing or basic fixed frequency, perhaps can derive from the source of another frequency.
As shown in Figure 2, phase frequency detector (PFD) 130 is used for the relative phase of comparison two signals, then output and the proportional signal of the deviation between them (phase shift).This output signal is used to regulate the frequency of carrier source 129, thus make the phase deviation that records at PFD 130 basic near and preferably equal zero.Therefore, the phase place of signal is fed ring lock and lives to prevent because the drift of not expecting of the signal phase that the phase place of carrier source 129 and the variation in the frequency (as distortion) cause.
As shown in Figure 2, from the feedback signal of carrier source 129 by frequency divider 128, a series of numerical control systems of phase component information that the frequency dividing ratio of frequency divider is received from SDM 125 by expression and the channel information that receives from channel calculator 124.The signal that obtains is delivered to PFD 130, and compares with signal as mentioned above from reference source 127.With the signal of this combination by low-pass loop filter 131, and with the carrier signal combination of carrier source 129.
In the present embodiment, SDM 125 is used for carrying out the wide-band modulation of the phase data that is input to SDM 125.Because the phase data that is input among the SDM 125 is not constant, so the output of SDM 125 and frequency divider 128 may be caused frequency shift (FS) synchronously, modulation signal is depended in this skew.Therefore, may SDM 125 and frequency divider 128 be carried out synchronously by reference source 127 in certain embodiments.For example, can between the input of the output of SDM 125 and frequency divider 128, use buffer memory, thereby frequency divider 128 can be finished frequency division counter before upgrading new hits series.
As shown in Figure 1, self adaptation phase place aligner 103 more also can be used for dynamically adjusting the PLL response, closely mates with the closed loop response of guaranteeing equalization filter 121 and PLL 126.Self adaptation phase place aligner 103 is more preferably measured the output phase of wideband modulator 102, and with its with obtain from base band input data perfectly version and the center frequency information that obtains from channel calculator 124 compare in theory.This result relatively is used for adjusting the loop gain of the PLL 126 of wideband modulator 102.This reponse system work is so that the error minimize of the signal that has sent.When transmitter is in service state the self adaptation phase place again aligner 103 preferably work and less needs to system's manual calibration.
Show in detail the self adaptation phase place exemplary embodiment of aligner 103 again among Fig. 2.Should be appreciated that and under the situation of needs, also can use self adaptation phase place aligner 103 other embodiment that are fit to again.Self adaptation phase place as shown in Figure 2 aligner 103 again can comprise, for example digital phase-locked loop (DPPL) 140, reference error filter 142, carrier phase detector/track and retainer 144, gain error detector 146 and RF phase quantizer 148.
DPLL140 is by removing owing to quantizing any constant phase deviation Φ and the random drift T that delay caused that demodulating process produces through SDM and RF Drift, aim at desired phase and actual RF phase place.
RF_VCO_Out＝cos(ω ct+K tot(1+δ)d n∫g(t)dt+w drift+Φ)
Reference error filter 142 produces the fixed phase error waveform from the loop filter transfer function of estimating.This reference error signal is basically as measuring true phase error.By true phase error signal and fixed phase error signal are multiplied each other, the polarity of PLL gain error preferably with the polarities match of automatic calibration feedback output.In addition, the mean value preferably proportional (not considering the polarity of phase information signal) of automatic calibration feedback output with the amplitude of PLL gain error.
The carrier wave of carrier phase detector/track and 144 pairs of digital additions of retainer and phase place (ideal) directly compare with the true phase place output of the VCO RF that has sampled.Carrier phase detector/track and retainer 144 are removed phase ambiguity (phase ambiguity), for example phase ambiguity of 2p-radian.And provide phase/frequency detection.
Gain error detector 146 produces the increment of the PLL gain error of estimating, and provides the signal of correction to gain with adjustment loop to PLL frequency plot detector.
RF phase quantizer 148 is used for thereby the RF carrier wave is sampled to extract baseband phase information reproduction modulation signal.This function for example can use A/D converter to realize.
Turn back to Fig. 1 now, the ripple of exporting from wideband modulator 102 of having handled preferably has constant envelope, and promptly it does not have the variation on the amplitude, yet it has the phase characteristic of original incoming wave.This output wave is sent to the place that needs then, and for example power amplifier 104, and it can comprise any of a large amount of amplifier devices that are fit to.In one exemplary embodiment, when power amplifier 104 was correctly regulated according to the numeric word of exporting from range weight, it was suitable for as current source.The amplitude of input signal part is transferred to power amplifier 104 from amplitude/phase signal processor 101 discretely, and can be used for acting on the carrier signal of power amplifier 104 each sections with amplification or the decay phase modulation relevant with original input signal.This has produced output current from power amplifier 104, this output current represent to comprise amplified or decay comprise carrier wave from input signal information.
In certain embodiments, the embodiment that for example has transmitter, receiver and wireless set, these equipment can customize owing to special input signal, carrier wave and output signal, for example, various cell phones, as CDMA, CDMA2000, W-CDMA, GSM, TDMA, wired and the wireless device that also has various other types, for example bluetooth, 802.11a ,-b ,-g, radar, 1 * RTT, radio, GPRS, computer and computer or non-computer communication equipment, handheld device etc.In modulation scheme, comprise by various embodiment supports: for example, GMSK, it is used for GSM; GFSK, it is used for DECT and bluetooth; 8-PSK, it is used for EDGE; OQPSK and HPSK, it is used for IS-2000; P/4DQPSK, it is used for TDMA; OFDM, it is used for 802.11.
Under the situation of needs, because control and treatment ripple and the analog-and digital-device of signal demand in these embodiments, so embodiment can use analog-and digital-device.For example, cell phone embodiment can be used analog-and digital-device.Can use various types of system configurations to come constructed embodiment.For example, under the situation of needs, embodiment or various device are arranged on the semiconductor device, the composition of the integrated circuit of integrated circuit or application-specific for example, and some examples comprise silicon (Si), SiGe (SiGe) or GaAs (GaAs) substrate.
Several specific embodiments of the present invention are described, to one skilled in the art, run into this change, modification and improvement easily.These significantly changes, modification and the improvement made as the disclosure are intended to belong to the part of this description, although there is not directly statement here, and are included in the spirit and scope of the present invention.Therefore one of ordinary skill in the art will understand software and hardware can be formed and/or can be to embodiments of the invention or this device and/or Devices Characteristics fully by hardware, software combination.As well-known to persons skilled in the art that the combination of the piece of each piece of accompanying drawing and accompanying drawing can implement in many different modes therefore.Therefore, the description of front only is for example, rather than restriction.The present invention only limits to by following claim and its equivalent institute restricted portion.

Claims (32)

1, a kind of method that phase component signal is carried out the broadband processing comprises:
Be used to produce one or more component representatives of input signal;
Based on described one or more components electromagnetic wave is carried out frequency division to produce the signal of having revised;
More described signal of having revised and reference signal; And
Result based on the comparison produces the signal of having handled.
2, method according to claim 1 also comprises:
Be the described signal selective channel of having handled, wherein said input signal comprises described channel selection.
3, method according to claim 2, wherein, described channel is selected by two representation in components, first component is included in the described input signal, second component comprises second input signal, and wherein said combination step comprises that also described second input signal of combination and described electromagnetic one or more components are to produce the signal of having revised.
4, method according to claim 3 also comprises:
Select to calculate described first component and described second component based on channel.
5, method according to claim 4, wherein, described channel is selected to be specified by a number, and described first component comprises the fractional part of described number, and described second component comprises the integer part of described number.
6, method according to claim 3 also comprises:
Make up described first component and second electromagnetic wave so that described input signal to be provided.
7, method according to claim 6 also comprises:
With described first component combination before handle described second electromagnetic wave.
8, method according to claim 7, wherein said treatment step comprises equalization filtering.
9, method according to claim 7, wherein said treatment step comprises calibration.
10, method according to claim 7, wherein said treatment step comprises modulated response filtering.
11, method according to claim 7 wherein also comprises compensation detected error in described processed signal based on the described step of having revised the comparison of signal and reference signal and having produced processed signal.
12, method according to claim 11, wherein said compensation process comprise from described second electromagnetic wave and obtaining with reference to electromagnetic wave, and adjust the described signal of having revised based on described with reference to electromagnetic wave
13, a kind of device that phase component signal is carried out the broadband processing comprises:
Be used to produce the means of one or more components representatives of input signal;
Based on described one or more components electromagnetic wave is carried out frequency division to produce the means of the signal of having revised;
The means of more described signal of having revised and reference signal; And
Based on the described means that relatively produce processed signal.
14, device according to claim 13 also comprises:
Be the means of described processed signal selective channel, wherein said input signal comprises described channel selection.
15, device according to claim 14, wherein said channel is selected by two representation in components, first component is included in the described input signal, second component comprises second input signal, wherein described second input signal and described one or more component and described electromagnetic wave is made up to produce the described signal of having revised.
16, device according to claim 15 also comprises:
Select to calculate the means of described first component and described second component based on channel, wherein said channel is selected to be specified by a number, and described first component comprises the fractional part of described number, and described second component comprises the integer part of described number.
17, device according to claim 16 also comprises:
With described first component combination before handle the described second electromagnetic means.
18, device according to claim 17, wherein said processing means comprise one or more means of selecting from the group of being made of compensating filter, calibration processor and modulated response filter.
19, device according to claim 18 also comprises compensation detected error in described processed signal.
20, device according to claim 19, wherein said compensatory device comprise from described second electromagnetic wave and obtaining with reference to electromagnetic wave, and adjust the described signal of having revised based on described with reference to electromagnetic wave.
21, a kind of Electromagnetic Treatment device comprises:
Modulator, the one or more component representatives that are used to produce input signal;
Frequency divider produces the signal of having revised by described one or more component controls and reception electromagnetic wave;
Comparator, the signal that is used for more described signal of having revised and reference signal and has handled based on described relatively generation.
Number of channel calculator is used to described processed signal selective channel, and wherein said input signal comprises described channel selection.
22, device according to claim 21 also comprises
Channel calculator, be used for described channel is selected to be appointed as by two representation in components, first component is included in the described input signal, second component comprises second input signal, wherein described second input signal and described one or more component and described electromagnetic wave is made up to produce the described signal of having revised.
23, device according to claim 22, wherein said channel is selected to be specified by a number, and described first component comprises the fractional part of described number, described second component comprises the integer part of described number, and wherein said first component and second electromagnetic wave combine provides described input signal.
24, device according to claim 23 also comprises: compensating filter, calibration processor and modulated response filter.
25, device according to claim 24, also comprise the self adaptation phase place aim at again device with the compensation in described processed signal detected error.
26, device according to claim 21, wherein the self adaptation phase place is aimed at device again and is communicated by letter with described comparator, and from described second electromagnetic wave, obtain, wherein when adjusting the described signal of having revised during with reference to the error of Electromagnetic Wave Detection in described processed signal based on described with reference to electromagnetic wave.
27, a kind of Electromagnetic Treatment device comprises:
Modulator, the one or more component representatives that are used to produce input signal;
Frequency divider produces the signal of having revised by described one or more component controls and reception electromagnetic wave;
Comparator, the signal that is used for more described signal of having revised and reference signal and has handled based on described relatively generation; With
The self adaptation phase place is aimed at device again, is used for compensation in the detected error of described processed signal.
28, device according to claim 27, wherein the self adaptation phase place is aimed at device again and is communicated by letter with described comparator, and from described second electromagnetic wave, obtain, wherein when adjusting the described signal of having revised during with reference to the error of Electromagnetic Wave Detection in described processed signal based on described with reference to electromagnetic wave.
29, device according to claim 28 also comprises:
Number of channel calculator is used to described processed signal selective channel, and wherein said input signal comprises described channel selection.
30, device according to claim 29 also comprises:
Channel calculator, be used for described channel is selected to be appointed as by two representation in components, first component is included in the described input signal, second component comprises second input signal, wherein described second input signal and described one or more component and described electromagnetic wave is made up to produce the described signal of having revised.
31, device according to claim 30, wherein said channel is selected to be specified by a number, and described first component comprises the fractional part of described number, described second component comprises the integer part of described number, and wherein said first component and second electromagnetic wave combine provides described input signal.
32, device according to claim 23 also comprises: one or more devices of selecting from the group that compensating filter, calibration processor and modulated response filter are formed.
CN 200380103933 2002-10-08 2003-10-07 Apparatus and method for wideband signal processing Pending CN1714499A (en)

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