CN101667842B - For the method and apparatus by the multiple common frequency signals of single cable process - Google Patents
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Abstract
A kind of method and apparatus for the treatment of passing through multiple signals that wall scroll radio frequency (RF) cable is fed on public frequency, it has or does not have one or more amplifier, and for forward direction or rl transmission.The present invention enables single power amplifier amplify to take multiple RF signals of common channel, and is the copy of the amplification of primary signal after zooming by these Signal separator.If needed, then this amplifying signal can be sent to different antenna ports to irradiate different base station sections.Signal separator function performs at antenna masthead, make this method can by the decreased number of feeder cable that rises along antenna tower to N/mono-like this, wherein N is the number (such as, the number of sector) of the common frequency signals amplified by single power amplifier.The present invention enables single power amplifier provide required whole radiofrequency signals to be fed to a general N simultaneously and inputs phased array antenna system, and forms the multi-antenna beam being used for several individual consumer uniquely simultaneously.
Description
The application be applicant Nortel Networks Ltd in the denomination of invention that on March 29th, 2004 submits to be the divisional application of the Chinese patent application No.200480014531.0 of " method and apparatus for by the multiple common frequency signals of single cable process ".
Technical field
The present invention relates to the field of radio frequency (RF) transmission and signal transacting related to this.More particularly, the present invention about one for the treatment of on public frequency by the method and apparatus of multiple signals of wall scroll radio frequency (RF) cable feeding, it has or does not have one or more amplifier, and for forward direction or rl transmission.
Background technology
In the field of RF transmission, there is many problems about component costs and reliability thereof.When considering typical antenna structure and the RF circuit element relevant to such antenna structure, situation is especially true.Under it is exposed to wind, precipitation and temperature extremes, so most antenna structure is incompatible with environment inherently.Such environmental difficulty often causes the RF circuit element premature breakdown be positioned on antenna, thus needs to send vehicle to be gone out and the time needing very expensive technical staff.And some RF circuit elements are considered to more to be subject to fault and damage.In addition, due to the difficulty in physics maintenance, antenna masthead or near placement RF circuit element to bring in logistics (if not fail safe) misgivings.At dismounting masthead repairing is the sole mode of maintenance subsequently, significant system downtime will be there is.Therefore, the designer of RF system is always finding the mode reducing and place powerful (and reliability is relatively low) RF circuit element at antenna and masthead.
Except consideration physically, the designer of RF system also must strive that keeping system loss is minimum.
Antenna structure in many radio-frequency (RF) transmission system (such as but not limited to, code division multiple access (CDMA) system) of multiple sector typically comprises the technology of the high power amplifier (HPA) needed for each sector.Concerning the application, should be appreciated that the term " antenna structure " wherein used should be read as and comprise any antenna itself or tower, mansion can also be comprised or support the similar physical means of given antenna.Due to the low reliability of HPA element, therefore HPA is the base portion being positioned at antenna structure under normal circumstances.Because each signal is through given HPA, so this feature (aspect) needs to plow RF cable laying to the antenna port on antenna masthead more.Often, so many sector systems also comprise the characteristic of such as wave beam separation and directional antenna array, and it further makes antenna tower itself be filled up by required RF cabling.Except weight is considered, along with the increase of RF cable laying, wind load becomes a more and more concerned problem.When occur such as embacle amass and/or the environment event of strong wind, adopt the very large surface area of RF cable laying form can cause the catastrophe failure of this antenna structure.
Therefore, required is so a kind of mode, wherein for the part (that is, masthead) relevant with antenna of a RF system (such as but not limited to cdma system), eliminate expensive, high-power (but low reliability) RF circuit element.Further, required is a kind of mode reducing by many times RF cable layings.
Summary of the invention
The invention provides a kind of method and apparatus for being processed the multiple signals taking public frequency by wall scroll RF cable.Method and apparatus of the present invention can comprise one or more HPA, and it is positioned at the base portion of the antenna structure for forward link transmissions.When rl transmission, method and apparatus of the present invention does not need the HPA being positioned at antenna structure base portion, but but needs the preamplifier being positioned at antenna structure masthead.Should be appreciated that such preamplifier power is relatively low, therefore for being placed on masthead, there is suitable reliability, and do not damage value of the present invention.
When the base portion of the antenna structure with unlike signal (on public frequency) uses multiple HPA, this HPA is positioned in and merges these signals and before they are fed to wall scroll RF cable.When use single HPA, alternative, but this single HPA is positioned in and merges after these signals before the signal of this merging of feeding to wall scroll RF cable.Any one of both of these case is all very suitable for forward link transmissions, and should easily understand, when not deviating from this method and device preset range, the realization that the particular location of one or more HPA and placing can provide due to the present invention and changing.In addition, the present invention does not need the existence of an even HPA.More properly, method and apparatus of the present invention is suitable for the rl transmission not using HPA.Under these circumstances, relatively reliably, lower powered preamplifier will be located in the antenna masthead of antenna structure.
The present invention is practicable for forward link transmissions in the following manner, that is: multiple signal (before or after being amplified by one or more HPA as above) is merged at antenna structure base portion, via the signal of this merging of wall scroll RF cable transmission to antenna masthead, and be transferred to one group of antenna port at the plurality of signal and before carrying out signal propagation from it, merged signal relief merged.
The present invention is practicable for rl transmission in the following manner, that is: merged again after the masthead place of antenna structure use low power amplifier amplifies multiple signal in advance, via the signal of this merging of wall scroll RF cable transmission to antenna base, and be transferred to one group of input port (such as, base station receiver input) at the plurality of signal to merge merged signal relief before carrying out Signal transmissions from it.
Of the present invention about merging multiple signal also subsequently to the feature that such gathering signal relief merges in same frequency, for RF system (such as but not limited to, there is the cdma system of masthead HPA and RF cable laying) in decrease expensive power RF circuitry elements the part relevant with antenna.In fact, the present invention is independently system (that is, independent of modulation format), and in this, any RF system transmitting multiple signal with public frequency on wall scroll RF cable will benefit from disclosed method and apparatus of the present invention here.
Method and apparatus of the present invention has been come by the modulation/demodulation scheme of Wilkinson (Wilkinson) combiner using Walsh (Walsh) code and improvement.Walsh code modulation/demodulation scheme is hereafter further being discussed.Basic conception in the present invention is the same for forward direction or reverse link.That is, occur that forward direction within the scope of the present invention and rl transmission all comprise following favourable feature: modulation has the signal of public frequency, merge such signal to transmit the signal of this merging along wall scroll RF cable, and releasing merging and demodulation are carried out to the signal of this merging, thus do not reconstitute this primary signal with there is no severe attrition, distortion or cross-talk.
When forward link transmissions, there is the short walsh code phase sequence (phasesequence) of each freedom of multiple (N) signal one of public frequency, modulated by the corresponding phase shifter in N number of input on each.Specifically, the plurality of signal according to a short walsh modulation sequence (having the length of 4 chips in illustrated example) by phase shift.Then this phase shift signal is merged assembles signal to form one.Then this gathering signal is exaggerated by being transferred through a single HPA.Alternatively, as mentioned above, these signals can be exaggerated and merged subsequently before being modulated by walsh code sequences.This allows the wall scroll RF cable gathering signal transmission of amplification upwards being reached antenna structure length through.At antenna masthead, the gathering signal of this amplification is separated, then demodulated via Walsh demodulation scheme together with the Wilkinson combiner of amendment via delay line.The signal of each relevant demodulation, phase shift is passed to for from the predetermined regarding antenna port wherein carrying out propagating afterwards.
In rl transmission situation, multiple (N) signal with public frequency is received at each antenna port, then by being transferred through each low-power preamplifier of being positioned at this antenna masthead and being exaggerated.Each exaggerated signal is by a short walsh code phase sequence, modulated by each phase shifter afterwards.Specifically, the plurality of signal according to a short walsh modulation sequence (being the length of 4 chips in illustrated example) by phase shift.Then this phase shift signal is merged assembles signal to be formed.This allows the gathering signal transmission of amplification to pass one to the wall scroll RF cable assigning antenna structure length.At the base portion of antenna structure, the gathering signal of this amplification is separated, then demodulated via Walsh demodulation scheme together with the Wilkinson combiner of amendment via delay line.The signal of each relevant demodulation, phase shift is passed to one group for carrying out the input port (such as, base station receiver input) of Signal reception afterwards.
Although the present invention may be used according to a certain mode, this method and device can be arranged to provide as above the Signal reception summarized or transmission by means of this mode, but the embodiment for the sake of clarity, discussed more in detail below mainly will concentrate on forward link.Should understand very well, for the those of ordinary skill of digital processing field, will recognize that the change of reverse link is also completely in preset range of the present invention.Equally, person of skill in the art will appreciate that detailed realization will need circuit details, it is only discussed with general term below.In addition, any general introduction is like this to clearly the preferred embodiments of the present invention are described.
Accompanying drawing explanation
Fig. 1 is a block diagram, describes two common carrier signals that are merged according to the present invention and that recover.
Figure 1A is a block diagram, and describe a different importation of figure shown in Figure 1, it comprises the multiple amplifiers for forward link configuration of the present invention.
Figure 1B is a block diagram, describes another different importation of figure shown in Figure 1, and it comprises the single amplifier for forward link configuration of the present invention.
Fig. 1 C is a block diagram, and describe a different output of figure shown in Figure 1, it comprises the multiple amplifiers for reverse link configuration of the present invention.
Fig. 2 is a flow chart, covers occurring the block diagram that the signal processing of different phase is in FIG described.
Fig. 3 is a block diagram, describes three common carrier signals that are merged according to the present invention and that recover.
Embodiment
Only in order to illustrative object, will in conjunction with some embodiment come present invention is described; But, be appreciated that other object of the present invention and advantage, become apparent by the following description to accompanying drawing according to the present invention.Although disclose preferred embodiment, do not mean that and be only limited to this.More properly, the General Principle here set forth is regarded as merely the explanation to the scope of the invention, and further can be interpreted as and can make many changes when not departing from the scope of the invention.
During cdma system or any relevant RF system cloud gray model, a sector corresponding to a multi-sector antenna may reach peak traffic capacity, and usually needs maximum power.Routinely, such as in three sector cells, when three cables rise along antenna tower and there are three corresponding HPA to send respective signal along corresponding cable, if the power of sector needs more than other two sectors, then has no idea to make power shift between the sectors.In the present invention, because signal is merged, so power is shared effectively between three sectors, and total power always can be used any sector effectively.This has come via the relay feature of a HPA and cable.
With reference to figure 1, there is illustrated the example of the first embodiment of the invention 100 using the modulating/demodulating realized via walsh code.Although illustrate only two signal input channels 10,11 for the sector of correspondence, should be appreciated that the signal (that is, N number of signal) the present invention likely being existed to multiple sector and correspondence.As shown, these two channels 10,11 (such as, CDMA forward link sector or wave beam) will be modulated via quick chip Walsh modulator 12,13.
Generally speaking, walsh modulation/demodulation involves and utilizes walsh code to distinguish different signals during the transmission.There is several different extended code by understanding in those skilled in the art, it can be used to be separated from each other by data-signal in cdma communication system.These extended codes include but not limited to pseudo noise (PN) code and walsh code.Walsh code corresponds to single row or column of hadamard (Hadamard) matrix.For example, in 64 channel CDMA spread spectrum systems, specifically mutually orthogonal walsh code can be elected from the set of 64 walsh codes in 64 × 64 hadamard matrixs.Further, specific data-signal can be separated with other data-signals to expand this specific data-signal by using specific walsh code.
In addition, those skilled in the art will understand that extended code can be used to carry out chnnel coding to data-signal.This data-signal is carried out chnnel coding, so that the impact by enabling signal transmission resist different channel impairments (such as noise, decline and obstruction) better, and improves the performance of this communication system.At modulated data signal so that before transmission subsequently, walsh code can be used to carry out chnnel coding to this data-signal.When not departing from preset range of the present invention, other orthogonal or quasi-orthogonal method also can be used to modulation in the method and apparatus for Equivalent embodiments of the present invention.In order to use walsh code in signal extension or chnnel coding, this walsh code must be easy to obtain so that application.A kind of technology making walsh code be easy to obtain is: generate walsh code by placing the walsh code wanted in based on the look-up table of memory.Subsequently, when each walsh code of needs, must be retrieved it from this look-up table.
In the present invention, the modulation of use is the long walsh code of 4 chips-such as, 4x4 walsh code matrix.Continue with reference to figure 1, each in two input channels 10,11 is modulated by carrying out two-phase PSK (BPSK) from the walsh code (at modulator 12, in 13) of unique (and different) in these 4 available walsh codes.This modulation rate is synchronized with normal CDMA spreading rate, but the N of this speed (that is, 4Fc) doubly.The effect of this (fast) walsh code modulation on normal CDMA chip is: produce Sin (the x)/x frequency spectrum of sideband having centered by carrier frequency, separate by N*Fc.Consider that input channel 10 fast walsh code zero (0) is modulated.Signal component for input channel 10 will enter " homophase " separator 16 and by 1/2 at a slow speed chip (that is, two " fast " chip delay lines 17) postpone discriminatively.
Continue with reference to figure 1, then walsh code modulated signals is merged into a RF stream by combiner 14.If generation forward link transmissions, so as shown in Figure 1A, input signal 10,11 can be exaggerated each via the high power amplifier (HPA) 30,31 of correspondence before modulation.Alternatively, as shown in Figure 1B, the public HPA32 also forward link realization used in the present invention after combiner 14 is placed on.Importantly to note: such merging allows at one or more HPA and uses wall scroll RF cable 15 between demodulating unit 12a, 13a at masthead (not shown).Although need cable larger a little, to the windage of these antenna tower and relevant structural upgrading by utilizing an only cable 15 and being significantly reduced.Preliminary experimental results shows, with regard to the present invention, depends on that the power consumption in the single cable of required cable length can minimize or may be better than the loss in the demodulation strengthened.
Then, two differential signals are applied in hybrid circuit (hybrid), this hybrid circuit by this gathering Signal separator in two different paths.The effect of similar " comb filter " is played in two " fast " chip delay lines 17 and the combination of four " fast " chip delay lines 18 (together with the switching circuit 19,20 be associated), force the differential RF signal from walsh code 0 and 1 to appear at " homophase " port of the Wilkinson combiner 22 of amendment, appear at " anti-phase " port of same combiner 22 from the differential RF signal of walsh code 2 and 3 simultaneously.Therefore, the combination of the Wilkinson combiner 22 of switching delay line filter (being as general as unit 16,17,18,19,20 and 21) and amendment serves as multiple decomposer 300 with the form of high-power RF walsh code discriminator.
The Wilkinson combiner 22 of this amendment is configured to a 4-port, relative phase discriminator.This means that the signal of two input ports (port one and port 2) appearing at " homophase " is merged in summation output (port 3), and the signal appearing at the input port of " anti-phase " occurs at difference port (port 4).To the main amendment of standard Wilkinson combiner be: the balancing resistor being just commonly used to dissipation inversion signal energy is replaced with RF transformer, which provide the low-loss path leading to difference port (port 4).But be object of the present invention, any (low-loss) circuit of that effectively can distinguish two " homophases " or " anti-phase " input signal all can be used in and replace Wilkinson combiner 22.
When signal demodulated device 12a, 13a reconstitute, the final stage of this processing procedure occurs, demodulator 12a, 13a are actual in the operation to modulator 12,13 is the same.Filter 23,24 further ensures that this output signal 10a reconstituted, 11a are substantially identical with input signal 10,11 and not containing any distortion.Should be readily appreciated that, when not departing from preset range of the present invention, except the forward link mentioned for Figure 1A and 1B above, transmission also can be in the reverse link.In this situation of rl transmission under the invention, HPA will not be used.More properly, low-power preamplifier 33,34 as is shown in fig. 1 c will be needed.
In the example illustrated in fig .1, modulator 12,13 and demodulator 12a, 13a comprise λ/2 circuit, and it is switched on or switched off by pin diode switch, and the clock signal that pin diode switch is derived by the N*Fc clock from transceiver controls.Although be PIN diode described here, those skilled in the art should understand easily: any suitable switch element can be used.Table 1 below indicates the signal transacting appeared in Fig. 1.
Table 1
Fig. 2 plotting mode shows a series of signal emulation.Shown each diagrammatic representation corresponds to the moment of the signal transacting of Fig. 1.In Fig. 2, input signal 10,11 is represented by graph of a correspondence 80,81.After modulation 12,13 and merging 14, this gathering signal illustrates with signal 1 component and signal 2 component that correspond to input signal 10 and 11 respectively in figure 82.This gathering signal is transmitted through one section of RF cabling 15.Multiple decomposition occurs in the other end of this RF cabling 15, and is represented by shown multiple decomposers 300, and produces the figure 83 and 84 corresponding to each modulation signal 1 and signal 2 component.Then each through multiple decomposition, modulated signal by demodulator 12a, 13a demodulation of correspondence to form signal 10a, the 11a of the recovery as shown in figure 85 and 86.
The multiple decomposers 300 illustrated in fig 1 and 2 represent separator 16, delay line 17,18,19,20,21, and the Wilkinson combiner 22 of amendment.Operationally, multiple decomposer 300 is differentiated by each signal (i.e. sector) of the different walsh code precoding of relative narrow band filter, and this relative narrow band filter delay line 17,18,19,20,21 is formed together with the Wilkinson combiner 22 of amendment.Because walsh code have expressed their mutual orthogonality in a frequency domain, so its discriminating task fulfiled by such filter.Specifically, four chip Walsh code-group are merged to the situation of two sectors, have four frequencies of dividing out by Fc/4, it can be merged with each chip produced in four walsh code chip set.For example, the first walsh code (that is, walsh code zero) has the zero offset frequency from input signal.That is, this primary signal is constant after by walsh code acyclic homologically trioial system.Therefore, the unique spectral of walsh code zero is only occupied at deviation frequency zero place.This frequency spectrum is formed with the frequency spectrum of walsh code 2 and contrasts, and walsh code 2 has its energy at deviation frequency 1*Fc/4 and 3*Fc/4 place.
Ideally, high-power, the low loss filter that have the small component tally function distinguishing strange and even deviation frequency (that is, the zero-sum 2*Fc/4 or 1 in this example and 3*Fc/4) can distinguish walsh code zero-sum walsh code 2.According to the present invention, simple delay line filter (being as general as 17 in Fig. 1,18,19,20,21) is fulfiled odd number/even frequency and is differentiated, wherein F (t)/2+F (t+2 chip)/2 only transmits walsh code zero-sum 1 (from this group of four), and F (t)/2-F (t+2 chip)/only transmit walsh code 2 and 3 from this group.Therefore, connection delay and undelayed chip make even deviation frequency (walsh code zero-sum 1) appear at normal (even-mode) to two combiners inputs of the Wilkinson combiner of amendment to export, and strange deviation frequency (walsh code 2 and 3) is occurred across the 4th (odd mode) Wilkinson port.4th Wilkinson port generally has the resistor of 100 ohm, but it is modified to the resistor comprising 50 ohm according to the present invention.It should be noted that in order to this object use 4 ports, 90 degree of hybrid circuits are also possible, as long as there is the low RF loss being less than 0.2dB.
As above, the present invention can be used in multiple signal.Although for the present invention only as described herein two signals, Fig. 3 shows the example being applied to the basic inventive concept that three sectors are arranged.
Fig. 3 shows the block diagram according to process of the present invention three (3) input signals 40,41,42.As above for as described in Fig. 1, each input signal 40,41,42 is modulated via modulator 43,44,45.Then this modulation signal is merged by combiner 46 and makes it through one section of RF cabling 47.Although not shown, multiple HPA or single HPA can be provided in the manner as described above during forward link transmissions.After transmitting via RF cabling 46, this gathering signal stream is through the first separator 50 and through more than first and second decomposer (stack up is respectively 50-56 and 60-66) arranged in cascaded fashion.Table 2 below shows the signal transacting always reached till this RF cabling 47 length.
Table 2
More particularly, this gathering signal stream is through the first delay line (being as general as 51,52,53,54,55) and subsequently with the Wilkinson combiner 56 through the first amendment of mode as described in Figure 1.But in this three sector configuration, the signal component that the difference port transmission of the first combiner 56 corresponds to input signal 42 is to demodulator 45a and filter 72 to export the signal 42a reconstituted, and it is substantially alike corresponding to input signal 42.The summation port transmission of the first combiner 56 corresponds to the residual signal component of input signal 40,42 in more than second decomposer (being as general as 60-66).This residual signal component is separated by the second separator 60 and is processed by the second delay line (being as general as 61,62,63,64,65), and is again processed in mode as described in Figure 1 by the Wilkinson combiner 66 of the second amendment subsequently.
In this, the signal component that the difference port transmission of the first combiner 56 corresponds to input signal 40 is to demodulator 43a and filter 70 to export the signal 40a reconstituted, and it is substantially alike corresponding to input signal 40.The residual signal component that the summation port transmission of the second combiner 66 corresponds to input signal 41 is to demodulator 44a and filter 71 to export regenerated signal 41a, and it is substantially alike corresponding to input signal 41.The signal transacting that table 3 below occurs after indicating inherent this section of RF cabling 47 of Fig. 3.
Table 3
Should be readily appreciated that, be reduced the traditional approach using multiple HPA and cable by the present invention, and reduce system cost, because one of HPA element that to be base station the most expensive.But, also it should be noted that multiple HPA still can have benefited from the demodulation configurations of the present invention's general introduction.
Further, within preset range of the present invention, even if use the sum of multiple HPA, HPA also can reduce, because the relation of input signal to the N:1 assembling signal can appear at this system Anywhere.Therefore, the relation of the 1:N of the demodulation of antenna end that will still benefit from tower of cdma communication system etc.In such a case, have realized that and still need many cables upwards to arrive antenna along tower, but by demodulating equipment of the present invention and method, by the existence of the HPA on elimination masthead.
Generally speaking, the present invention provides the improvement of significant capacity to communication system (such as but not limited to, CDMA Cellular System).These improve is the direct result that base station section relaying usefulness exceedes the usefulness that those can obtain from every Sector Power amplifier individuality.This is caused by the following fact, and namely in CDMA Cellular System, mobile service amount distribution normally crosses over that each sector distributes unequally.Therefore, sector, before be everlasting other and additional user are linked into this sector by stop, reaches its maximum power (that is, traffic peak) ability.But the present invention allows to be re-routed to the heavy sector of load from the RF power of the sector of other utilization deficiency.Therefore, the much bigger traffic carrying capacity be supplied to can be held before stop occurs, this effectively increases the maximum traffic capacity of base station.
The present invention makes all RF power from all sectors can both be available in any sector, to mate the combination of arbitrary (arbitrarily) sector traffic load.This processing procedure is automatic, although and therefore sector load is uneven, also improve the volume of business of base station.Further, reduce quantity and the size of antenna tower RF cables, contribute to system operator controls them capital expenditure by the reinforcement criteria reducing tower.Further, if antenna tower are shared by system operator or rented, then when cable increases, rental expenses usually increase.Importantly, in such a case, system operator may be prevented from the number (load of supporting business amount increase needed for) of extended antenna tap cable.Certainly, this directly can affect the increase of income in the future in those places.
The nearest introducing of antenna system makes the problem aggravation spoken of above, and antenna system needs more RF cable than traditional system usually, particularly when HPA is not arranged on tower top.The present invention by allow base station RF interfaces to keep relatively simple (every sector only has one or two transmitter and receiver ports) and still can interface in and utilize the phased array system with six, eight or more constrained input ports, and overcome this point.
Should be appreciated that the preferred embodiment mentioned is only illustrative for the present invention here.In view of following patent requirement, when not deviating from preset range of the present invention and field disclosed in this, can conceive there is multiple change in design and use of the present invention.
Claims (6)
1., for the treatment of the device of N number of input signal with public frequency and spreading rate, described device comprises:
At least N number of modulator, for becoming N number of modulation signal by N number of signal madulation of described N number of input signal;
Combiner, for being merged into gathering signal by described modulation signal;
Decomposer unit, for becoming N number of compositional modulation signal by described gathering signal decomposition;
At least N number of demodulator, for each in described N number of compositional modulation signal being demodulated into the signal of N number of recovery, the signal of each recovery corresponds to one of described N number of input signal;
Wherein said decomposer unit comprises: N-1 separator, the delay cell relevant to each separator, and the phase-shift discriminator relevant to each delay cell, wherein each delay cell has one or more for carrying out the switch switched in the delay depending on described spreading rate
Wherein each delay cell comprises:
First delay line, exports from first of its relevant separator for sending;
Second delay line and the transmission line relevant to described second delay line, export from second of its relevant separator for sending; And
Described one or more switch, for switching signal between described second delay line and described transmission line, exports for controllably described delay being added to described second.
2. device as claimed in claim 1, the described delay wherein introduced by described first delay line in the first delay cell corresponds to 1/2 of the chip under described spreading rate.
3. device as claimed in claim 2, the described delay wherein introduced by described first delay line in the first delay cell equals 2 times of the delay introduced by described first delay line in the first delay cell delay cell subsequently.
4. device as claimed in claim 3, wherein, described transmission line introduces minimum delay, described second delay line introduces the delay corresponding to the chip under described spreading rate, make the described delay when described switch-linear hybrid is a position equal the retardation introduced by described second delay line, and described delay equal the minimum delay when described switch-linear hybrid is in another location.
5. device as claimed in claim 4, wherein, for one of two delaying states in each chip period at a slow speed, described switch-linear hybrid is on a position, and for switch-linear hybrid described in another delaying state on another location, make signal in one of two separation signal paths in each phase-shift discriminator relative to the signal alignment in another path.
6. device as claimed in claim 2, wherein, described device is that three sector base stations are configured with N=3, described decomposer unit is made to comprise the first and second separators, and wherein said first delay cell is relevant to described first separator, and wherein, described first delay line of second delay cell relevant to described second separator introduces the delay of 1/4 of the chip equaled under described spreading rate.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US45801203P | 2003-03-28 | 2003-03-28 | |
| US60/458012 | 2003-03-28 | ||
| US10/642686 | 2003-08-19 | ||
| US10/642,686 US7424039B2 (en) | 2003-03-28 | 2003-08-19 | Method and apparatus for processing multiple common frequency signals through a single cable |
| CN2004800145310A CN1795624B (en) | 2003-03-28 | 2004-03-29 | Method and apparatus for processing multiple common frequency signals through a single cable |
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| CN2004800145310A Division CN1795624B (en) | 2003-03-28 | 2004-03-29 | Method and apparatus for processing multiple common frequency signals through a single cable |
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| CN2004800145310A Expired - Fee Related CN1795624B (en) | 2003-03-28 | 2004-03-29 | Method and apparatus for processing multiple common frequency signals through a single cable |
| CN2004800148130A Expired - Fee Related CN1799236B (en) | 2003-03-28 | 2004-03-29 | Method and apparatus for processing multiple common frequency signals through a single cable by circulator |
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| CN102142872A (en) * | 2010-01-29 | 2011-08-03 | 中兴通讯股份有限公司 | Device and method for configuring power amplifying antenna in user equipment |
| CN102457316A (en) * | 2010-10-15 | 2012-05-16 | 中兴通讯股份有限公司 | System for carrying out multi-antenna transmission by utilizing indoor wireless signal coverage system and method thereof |
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| US5784683A (en) * | 1995-05-16 | 1998-07-21 | Bell Atlantic Network Services, Inc. | Shared use video processing systems for distributing program signals from multiplexed digitized information signals |
| CN1274243A (en) * | 1999-05-17 | 2000-11-22 | 上海贝尔有限公司 | Safety terminal with coaxial cable transmission of cable TV |
| US6522642B1 (en) * | 1994-11-03 | 2003-02-18 | Intel Corporation | Antenna diversity techniques |
| CN1795624B (en) * | 2003-03-28 | 2010-12-29 | 北方电讯网络有限公司 | Method and apparatus for processing multiple common frequency signals through a single cable |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TW472439B (en) * | 1995-10-23 | 2002-01-11 | Thomson Consumer Electronics | Apparatus for controlling the conversion gain of a down converter |
| GB2310109B (en) * | 1996-02-08 | 2000-07-05 | Orange Personal Comm Serv Ltd | Antenna arrangement |
| US6259687B1 (en) * | 1997-10-31 | 2001-07-10 | Interdigital Technology Corporation | Communication station with multiple antennas |
-
2004
- 2004-03-29 CN CN200910170571.9A patent/CN101667842B/en not_active Expired - Fee Related
- 2004-03-29 CN CN2004800145310A patent/CN1795624B/en not_active Expired - Fee Related
- 2004-03-29 CN CN2004800148130A patent/CN1799236B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6522642B1 (en) * | 1994-11-03 | 2003-02-18 | Intel Corporation | Antenna diversity techniques |
| US5784683A (en) * | 1995-05-16 | 1998-07-21 | Bell Atlantic Network Services, Inc. | Shared use video processing systems for distributing program signals from multiplexed digitized information signals |
| CN1274243A (en) * | 1999-05-17 | 2000-11-22 | 上海贝尔有限公司 | Safety terminal with coaxial cable transmission of cable TV |
| CN1795624B (en) * | 2003-03-28 | 2010-12-29 | 北方电讯网络有限公司 | Method and apparatus for processing multiple common frequency signals through a single cable |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1795624A (en) | 2006-06-28 |
| CN101667842A (en) | 2010-03-10 |
| CN1795624B (en) | 2010-12-29 |
| CN1799236B (en) | 2010-12-08 |
| CN1799236A (en) | 2006-07-05 |
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