CN1317172A - Method for increasing capacity of orthogonal waveform multiple access network, and associated units - Google Patents

Method for increasing capacity of orthogonal waveform multiple access network, and associated units Download PDF

Info

Publication number
CN1317172A
CN1317172A CN 00801350 CN00801350A CN1317172A CN 1317172 A CN1317172 A CN 1317172A CN 00801350 CN00801350 CN 00801350 CN 00801350 A CN00801350 A CN 00801350A CN 1317172 A CN1317172 A CN 1317172A
Authority
CN
China
Prior art keywords
communication
technology
multiple access
ocdma
access technology
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN 00801350
Other languages
Chinese (zh)
Inventor
海克米特·萨里
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Alcatel CIT SA
Alcatel Lucent SAS
Alcatel Lucent NV
Original Assignee
Alcatel NV
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Alcatel NV filed Critical Alcatel NV
Publication of CN1317172A publication Critical patent/CN1317172A/en
Pending legal-status Critical Current

Links

Images

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/69—Spread spectrum techniques
    • H04B1/707—Spread spectrum techniques using direct sequence modulation
    • H04B1/7097—Interference-related aspects
    • H04B1/71—Interference-related aspects the interference being narrowband interference
    • H04B1/7101—Interference-related aspects the interference being narrowband interference with estimation filters
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/24—Radio transmission systems, i.e. using radiation field for communication between two or more posts
    • H04B7/26—Radio transmission systems, i.e. using radiation field for communication between two or more posts at least one of which is mobile
    • H04B7/2628—Radio transmission systems, i.e. using radiation field for communication between two or more posts at least one of which is mobile using code-division multiple access [CDMA] or spread spectrum multiple access [SSMA]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/24—Radio transmission systems, i.e. using radiation field for communication between two or more posts
    • H04B7/26—Radio transmission systems, i.e. using radiation field for communication between two or more posts at least one of which is mobile
    • H04B7/2643—Radio transmission systems, i.e. using radiation field for communication between two or more posts at least one of which is mobile using time-division multiple access [TDMA]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J13/00—Code division multiplex systems
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J13/00—Code division multiplex systems
    • H04J13/0077—Multicode, e.g. multiple codes assigned to one user

Abstract

The invention concerns a method for increasing by M, M being any integer not less than 1, the number N, N being an integer not less than 2, communications set up between a central unit (15) and remote units (20<1> to 20<N>; 21<1> to 21<M>) of an orthogonal waveform multiple access network. The first N communications are multiplexed by orthogonal waveform multiple access in accordance with a first technique from the set of multiple access techniques consisting of TDMA, OCDMA, OFDMA and MC-OCDMA. The M communications additional to said N established communications are multiplexed by orthogonal waveform multiple access in accordance with a second technique from the set of multiple access techniques consisting of TDMA, OCDMA, OFDMA and MC-OCDMA, said second access technique being different from the first access technique, and it uses the whole or partly of the frequency section used by the first frequency.

Description

Be used to increase the method and the units corresponding of capacity of orthogonal waveform multiple access network
The present invention relates in general to a kind of method that is used to increase the capacity of orthogonal waveform multiple access network, and central authorities and/or remote unit that this method input is used.One orthogonal waveform multiple access network (O.W.M.A, refer to English " Orthogonal Waveform Multiple Access (orthogonal waveforms multiple access) ") in a given N telex network, distribute available frequencies or spectrum (N obtains ratio between the frequency spectrum for the total frequency spectrum of N signal post's acquisition and for single communication) again and again, it is characterized in that the interference between a or two telex network is substantially zero when the communication sum is less than or equal to N.On the contrary, if we add an additional communication, forbid for one of N at least communication of being set up this interference so.Therefore exceeding outside the threshold value of determining the maximum number of communications that allows, for one of these communications, its communication quality has rapid decline at least.
The network of the type belongs to the network that resists mutually with the network of for example PN (English " pseudo-noise (pseudo noise) ") waveform code division multiple access type, uses the quality of each communication of a specific PN sequence to descend pro rata with the quantity of using other PN sequence to communicate by letter therein.Therefore, the communication sum of allocated frequency band equals 2 from number of communications according to sharing, and communication quality descends gradually.
TDMA (" Time Division Multiple Access " time division multiple access), OFDMA (" Orthogonal Frequency Division Multiple Access (OFDM) "), OCDMA (" Orthogonal Code Division MultipleAccess (orthogonal code division multiple access) ") and MC-OCDMA (" MultiCarrierOrthogonal Code Multiple Access (overloading orthogonal code division multiple access) ") technology has constituted the orthogonal waveforms multiple access technology.In the following description, will use different terms " pattern " and " technology " to show a given access technology.For example, for the TDMA technology, what each of N communication had usable spectrum respectively by turns in a time window totally shares usable spectrum.In the OCDMA technology, make the communication coding of difference mutually by offering each one of communication, whole usable spectrum is shared in N communication, and each can insert entire spectrum simultaneously.
These major defects that are called as the technology of orthogonal waveforms multiple access are that they are defined by a limit, exceed outside this limit, can set up communication without any a new user, because there be N resource to be used.Therefore can not add a loss of communicating by letter and not causing at least one ongoing communication again.In a wireless communication system, existing solution is to overcome this problem like this, for example by reducing the yardstick by a sub-district that the base station covered, thereby has reduced potential user's number of available resources in this sub-district.And this scheme must have one to surpass its required system.
Another is applied for by the applicant that at present still undocumented a solution described in the patent application is to use for N first communication sequence of Hua Ershi-Ha Demade (Walsh-Hadamard) type in an OCDMA (" Orthogonal Code DivisionMultiple Access (orthogonal code division multiple access) ") network, and when the sequence of N Hua Ershi-Ha Demade type has been used by N signal post that is set up, use the PN sequence for ensuing M communication.The defective of one this solution is, for relating to M each of communicating by letter using a coding or sequence PN to be set up, two types interference is arranged in this communication: by the interference of N Hua Ershi-Ha Demade sequence signal post generation and the interference that produces by (M-1) that use other PN sequence to be set up individual other signal post.Thereby be to eliminate these two types of interference signals processing may need certain processing time and the relative algorithmic statement number of times of length.
Therefore the invention reside in to an orthogonal waveform multiple access network a kind of method and relative transmitter and receiver are provided, and the problem of avoiding the communication of when an added communications is set up, having set up sharply to descend, and eliminated aforementioned signal processing convergence time problem.According to invention, say that in mode general and that simplify the adding of a communication only causes the decline (English graceful degradation) of other communication " perfection ".
For this reason, a kind of method that increases M for the times N of the communication that will between the remote unit of a central location and orthogonal waveform multiple access network, be set up, M is the integer more than or equal to 1, N be one more than or equal to 2 integer, according to this method, described N first communication is according to TDMA, OCDMA, the multiple access technology that OFDMA and MC-OCDMA access technology are constituted concentrates the orthogonal waveforms multiple access of first technology to come multiplexing, it is characterized in that being attached to described N described M communication in the communication of having set up according to invention is according to TDMA, OCDMA, the orthogonal waveforms multiple access of second technology is next multiplexing in the multiple access technology set that OFDMA and MC-OCDMA access technology are constituted, and this second technology is different with first technology.
Better, according to invention,
First interference that with good grounds first multiple access technology of-synthetic institute is produced in each communication according to second multiple access technology,
-from each communication according to second multiple access technology deduct described first disturbing of producing of all signal posts of with good grounds first multiple access technology,
First interference that the with good grounds second multiple access technology communication of-synthetic institute is produced in each communication according to first multiple access technology,
-from each communication according to first multiple access technology deduct the signal post of with good grounds second multiple access technology produce this first disturb.
For improving the quality of received signal, we can repeat aforesaid method up to P time.Therefore, for a certain more than or equal to a P value of 2,
(1)-in first substep, each according to the communication of second technology on the individual interference separately of P that produces of the signal post of with good grounds first technology of synthetic institute, this is to realize according to the judgement on the value of symbol in the communication of first technology at these by utilizing, value of symbol is to obtain in one second substep of last (P-1), from communication separately, deduct this P interference then according to second technology, after from described each communication, deducting this P interference, determine the value of symbol of each communication according to second technology according to second technology;
(2)-in one second substep, each according to the communication of first technology on the individual interference separately of P that produces of the signal post of with good grounds second technology of synthetic institute, this is to realize according to the judgement on the value of symbol in the communication of second technology at these by utilizing, value of symbol be in front in first substep (1) obtain, from communication separately, deduct this P interference then according to second technology, after from described each communication, deducting this P interference, determine each value of symbol according to the communication of first technology according to first technology.
A cordless communication network is therefore and obtained, and the communication that is established therein has:
N between those first remote units and central location 15 first communication, these N first communication is according to by TIDMA, OCDMA, the orthogonal waveforms multiple access of first technology is re-used in the multiple access technology set that OFDMA and MC-OCDMA access technology are constituted, and
-at least one is additional to the communication of described N communication, between at least one second remote unit and affiliated central location, according to by TDMA, OCDMA, second technology in the multiple access technology set that OFDMA and MC-OCDMA technology are constituted, be established by the orthogonal waveforms multiple access, this described second multiple access technology is different from first multiple access technology.
Typically, the unit of this network comprises:
-one first first synthesizer that disturbs that in each communication, produced of with good grounds first access technology according to second access technology,
-one be used in each communication, deducting according to second access technology described first subtracter that disturbs that produces of the signal post of with good grounds first access technology,
-one first another synthesizer that disturbs of in each communication, being produced of with good grounds second access technology according to first access technology, and
-one be used in each communication, deducting according to first access technology described first another subtracter that disturbs of producing of the signal post of with good grounds second access technology.
In the same way, P be one a certain more than or equal to 2 integer, for a certain value P, the unit comprises:
-for one first substep, one be used for each according to the communication of second pattern on P synthesizer of the individual interference separately of P that produces of the signal post of with good grounds first pattern of synthetic institute, this is to realize according to the judgement on the value of symbol in the communication of first pattern at these by utilizing, value of symbol is to obtain in one second substep of previous row (P-1), from communication separately, deduct this P subtracter that disturbs then according to second technology, after from described each communication, deducting this interference P, determine each definite device according to the value of symbol of the communication of second pattern according to second pattern;
-for one second substep, one be used to synthesize each on according to the communication of first pattern P synthesizer of P interference separately producing of the signal post of with good grounds second pattern, this is to realize according to the judgement on the value of symbol in the communication of second pattern at these by utilizing, value of symbol be in front in first substep obtain, subtracter deducts this P interference from the communication separately according to first technology, determine that device deducts after this P the interference, determines each value of symbol according to the communication of first pattern from described each communication according to first pattern.
Invention also provides a kind of central authorities or remote unit of cordless communication network, it comprises one according to TDMA, OCDMA, first emittor/receiver of the technical work one of in the set of multiple access technology that OFDMA and MC-OCDMA technology are constituted, with all or part of of use first a technology similar frequency bands and according to TDMA, OCDMA, second emittor/receiver of another technical work in the multiple access technology set that OFDMA and MC-OCDMA technology are constituted.When mentioning emittor/receiver and use the first technology similar frequency bands all or part of, this show according to first and second technology the communication of setting up respectively use the identical frequency spectrum of at least a portion.Term " part " is to result to consider that N communication can occupy one in practice than M the frequency spectrum that communication is big, and M is less than N.Yet,, launch these M communications in the frequency spectrum that more strengthens that we can be consistent at the frequency spectrum of one N communication for example for the OCDMA pattern.In all cases, according to invention, importantly the upper bound and a determined maximum constraints of lower bound by the frequency spectrum of N communication is arranged, so that the operator of radio communication is not compelled to use another frequency spectrum outside the frequency spectrum of distributing to N communication by M the occupied frequency spectrum of added communications.
An above-mentioned central location that belongs to the cordless communication network type and communicate by letter with a plurality of remote units, comprise a distributor that is used to distribute a resource according to invention, perhaps according to TDMA, OCDMA, first technology in the multiple access technology set that OFDMA and MC-OCDMA access technology are constituted, perhaps according to TDMA, OCDMA, second technology in the multiple access technology set that OFDMA and MC-OCDMA technology are constituted, based on the availability of N resource of first access technology, use all or part of of the first technology similar frequency bands.
Other features and advantages of the present invention will be by to the following describes book and with reference to the reading of respective drawings and more clearly display, wherein:
-Fig. 1 is the simplified diagram of a multi-access network;
-Fig. 2 and 3 each show energy distribution schematic diagram according to the time for two orthogonal waveforms multiple access technologies separately;
-Fig. 4 is a receiving circuit block diagram according to two transport communication set between two different orthogonal type of waveform of first variation of invention;
-Fig. 5 is a receiving circuit block diagram according to two transport communication set between two different orthogonal type of waveform of second variation of invention; And
The form of a block diagram of-Fig. 6 shows the remote unit and the central location that communicate according to invention between them.
With reference to Fig. 1, the present invention is used for an orthogonal waveform multiple access network.In this network, (N+M) individual communication is at (M+N) individual remote unit 20 separately 1-20 NWith 21 1-21 MAnd be established between a central location 15.For example also sheerly for unit 201-20N and 21 is described 1-21 MBe the terminal of fixing or move, and central location 15 is wireless communication network base station.Network can also be a cable network, or a satellite network.It is because are multiplexing in a given frequency spectrum in a plurality of communications between remote unit and the central location that network is called as multiple access.Multiplexing can be according to the time division multiplexing of TDMA technology or according to the frequency division multiplexing of OFDMA technology, or or even according to the code division multiplexing of OCDMA technology.
According to invention, respectively with unit 20 1-20 NCommunicate by letter according to TDMA with the N individual first of central location 15, OCDMA, first technology in the multiple access technology set that OFDMA and MC-OCDMA technology are constituted is established.When any resource (timeslice in the TDMA pattern of using this first multiple access technology, coding in the OCDMA pattern, or the like ...) for setting up communications that are additional to these N that set up communications when being disabled, set up a new communication by using the different access technologies that can use for first access technology (and its uses identical frequency spectrum or the part of this frequency spectrum).
Therefore, for an ensuing M unit 21 1-21 MM be some more than or equal to 1 and based on the given reason in back basically less than the integer of N, M added communications separately can be according to TDMA, OCDMA, second technology in the multiple access technology set that OFDMA and MC-OCDMA technology are constituted is established, and this second multiple access technology is different from first technology.Thereby these M added communications does not induce the interference that may cause N the loss of communications of having set up.
Fig. 2 shows according to a given embodiment, for the energy distribution of transport communication between two different orthogonal waveforms, they are TDMA (Time Division Multiple Access (time division multiple access)) and OCDMA (Orthogonal Code Division Access (orthogonal code division multiple access)) technology.In this Fig. 2, TC represent one " sheet (chip) " during, constitute a basic symbol by the employed coding of OCDMA technology, Ts=N.TC, it be the communication of being set up a basic symbol during, be typically a bit, or the binary system bit.Can review to, according to the OCDMA technology, when emission, each traffic symbols is multiplexing by one of a plurality of OCDMA codings of quadrature between them institute.Each of these codings be for example one please institute's reference in basis U.S. Pat-A-5103459 disclosed in the sequence that is called as Hua Ershi-Ha Demade of type.This sequence is defined by the binary system bit series with speed more much higher than traffic symbols speed.Therefore it is represented by each communication expansion on a wave band, and this wave band is more much bigger than the needed theoretical wave band of transmission on the first-harmonic section of traffic symbols.Thereby when receiving, the regeneration of employed encode series is used to separate each communication during emission, this communication is doubly launched on the wave band of the wave band that each signal post obtains corresponding to N at one when emission, and N is corresponding to the ratio between traffic symbols speed and the coded sequence speed.
From this Fig. 2, at least in theory, go up on the standardized scale in the time " sheet ", use each communication of TDMA pattern to disturb a theory of using to be produced in the communication of OCDMA pattern, and each uses the communication of OCDMA to disturb and can be lowered a theory of using to be produced in the communication of TDMA pattern conversely, when these OCDMA and tdma communication are transmitted on same frequency range simultaneously.
Very clear, because a use that is called as orthogonal waveforms, TDMA or OCDMA, for each given pattern, TDMA or OCDMA, the interference that communication is produced between them is zero.
We can also describe simplifiedly in addition, and each communication with the OCDMA pattern is defined:
Equal by the time (T of communication on the N of the shared frequency range of a first-harmonic section frequency range doubly at one s) in take continuously, N is the processing gain (English " processing gain (processing gain) ") of OCDMA coding, and
Each communication with the TDMA pattern is defined:
Time window (the T that continues that equals the N frequency range that doubly signal post takies on the first-harmonic section C) during unique timing take (we suppose that tdma frame only is used for transmitting up to being used for N the communication that this demonstration is simplified), and
A TDMA pattern communication transmitting power; It only is present in a time slice, and with an OCDMA pattern communication transmitting power, it is continuously transmission, between average proportions given by N institute, in OCDMA pattern and TDMA pattern, be identical with energy that symbol was transmitted.
For N communication of the every symbol N of the use bit length coding of setting up with the OCDMA pattern, and with M communication of TDMA pattern foundation, the interference between these two kinds of communication types is as follows:
The interference of M tdma communication in an OCDMA communication
Given by 1/N in theory by the interference that a single TDMA pattern communication is caused on an OCDMA pattern communication, N is the expansion factor between OCDMA pattern communication frequency spectrum and frequency spectrum that the first-harmonic section is communicated by letter, or " processing gain ".In fact each TDMA pattern communication only is to produce interference on the time at the 1/N of OCDMA pattern communication.Therefore for M TDMA pattern communication, the interference that produces on an OCDMA pattern communication is M/N.Thereby Here it is, and this limit the sum that ensuing unit 201-20M is allowed than M/N, the added communications of TDMA pattern can be set up in these unit, therefore M must be very significantly less than N, with the communication of avoiding the OCDMA pattern owing to disturb too high former thereby loss.
The interference of N OCDMA communication on 1 tdma communication
Given by 1/N in theory by the interference that an OCDMA pattern communication is caused on a TDMA pattern communication, N is the expansion factor between OCDMA pattern communication frequency spectrum and frequency spectrum that first-harmonic section (TDMA) is communicated by letter, or " processing gain ".Each OCDMA pattern communication, it doubly is unfolded on the frequency spectrum of first-harmonic section equaling N, in fact have a power at one and produce in for the timeslice occupied and disturb, because the power of communications of TDMA pattern is concentrated on the single tdma frame timeslice exactly with respect to the TDMA pattern communication of the ratio 1/N of TDMA pattern communication power.Therefore for N OCDMA pattern communication, the interference that produces on a TDMA pattern communication is whole and equals N/N=1.Equally, in Fig. 3, what illustrate is that they are OFDMA and MC-OCDMA technology for the power division of the communication of transmitting respectively between two different orthogonal patterns.
According to invention, relate to the interference of M tdma communication in an OCDMA communication, and the aforementioned factor of the interference of N OCDMA communication on a tdma communication has produced a receiver sketch, it has at first deducted the interference that the communication by the OCDMA pattern is produced on each TDMA pattern communication, because, as what we saw, the communication of each TDMA pattern equals 1 signal to noise ratio by one to be determined, can break away from without any a processing that employed signal disturbs in the TDMA pattern communication.
According to first embodiment and with reference to Fig. 4, this receiver sketch is presented.Receiver in type shown in Fig. 4 for example is comprised in a central location 15 and remote unit 20 1-20 NAnd 21 1-21 MEach in, to guarantee at central location 15 and remote unit 20 1-20 NAnd 21 1-21 MBetween set up two-way communication.For this two-way communication, be data feedback channel communication on the one hand, be down going channel communication on the other hand, use two different frequency ranges typically.Technical term for a strictness, it is also noted that if term TDMA (Time DivisionMultiple Access (time division multiple access)), OFDMA (Orthogonal FrequencyDivision Multiple Access (OFDM)), OCDMA (OrthogonalCode Division Multiple Access (orthogonal code division multiple access)) and MC-OCDMA (MultiCarrier Orthogonal Code Division Access (overloading orthogonal code division multiple access)) are suitable for for data feedback channel, for the term that down going channel was suitable for is respectively TDM (Time Division Multiplex (time division multiplexing)), OFDM (Orthogonal Frequency Division Multiplex (OFDM)), OCDM (Orthogonal Code Division Multiplex (Orthogonal Frequency Division Multiplexing)) and MC-CDM (MultiCarrier Code Division Multiplex (overloading code division multiplexing)) say that exactly down going channel can not cause multiple access.
For N communication port of OCDMA pattern, receiver comprises N adjuster 1 1-1 N, N first threshold detector 2 1-2 N, one first is disturbed combiner circuit 3, N subtracter 4 1-4 N, N second threshold detector 5 1-5 N, one second is disturbed synthesizer 6.It also comprises M first subtracter 7 for M communication port of TDMA pattern in addition 1-7 M, M first threshold detector 8 1-8 M, one is disturbed combiner circuit 9, M second subtracter 10 1-10 M, and M second threshold detector 11 1-11 MShow unit 1 1-1 NEach term " adjuster " be used in this description, be not only in order to show that is said the circuit that guarantees calibration function (that is to say between the local OCDMA coded sequence that is used for peak detection received signal and and survey the circuit that overlaps) exactly, but also be an adjunct circuit (that is to say the covering function that can guarantee multiple signals, and guarantee demodulation) that therefore is used for the OCDMA signal of communication that demodulation receives according to the local sequence received signal of encoding as the suitable OCDMA that is surveyed.This circuit is known in the background technology for term CDMA.
Each of N adjuster is with communication that receives respectively of OCDMA pattern demodulation, and to produce a signal of communication on the OCDMA of demodulation first-harmonic section, it is used to N first threshold detector 2 1-2 NSeparately one.In fact each threshold detector 2 1-2 NIt is a circuit that receives OCDMA demodulation first-harmonic section signal of communication, it produces symbol in a limited assemble of symbol that is allowed, the symbol that is produced be by threshold detector 21 to the symbol that 2N kept, be the significant character that transmits by distance transmitter as having maximum possibility.Each is by threshold detector 2 1To 2 NA series of symbols that is produced separately be used to first input separately disturbing combiner circuit 3.This latter uses an interference assessment algorithm, and interference is that the integral body by the OCDMA signal produces on each tdma communication passage.For example, algorithm can be following:
N remote unit of same given time OCDMA pattern respectively the emission N symbol can be a I (i=1,2 ..., N), and the k of the Hua Ershi-Ha Demade sequence relevant with i OCDMA pattern remote unit " sheet " can be w I, k
For with k the equitant signal section of small pieces, the theoretical value of the interference of these N remote unit in the communication of m TDMA pattern remote unit is remembered work: I m = &Sigma; i = 1 N a i , w i , m - - - ( 1 )
N remote unit Mi remote unit with the interference in the communication of TDMA pattern synthetic by in expression formula (1) by separately threshold detector 2 1-2 NObtained effective ruling, note is made i, replace an a iAnd obtain.
For the interference of the N of the communication that relates to M TDMA pattern on the OCDMA pattern each of communicating by letter, it is following form: I n = &Sigma; i = 1 M a N + i , w n , i * - - - ( 2 )
Symbol a N+i (i=1,2 ..., M)Be illustrated in the symbol of M separately that same given time is launched by the remote unit of M TDMA pattern.If asterisk represents that conjugate complex number and the employed expansion sequence of OCDMA are that real number just disappears from expression formula.
As previously mentioned, the interference in the remote unit communication of n OCDMA pattern of M remote unit synthetic by in expression formula (2) by separately threshold detector 8 1-8 NObtained effective ruling, note is made N+i, replace an a N+iAnd obtain.
According to invention, always have a signal of communication for what obtain a given pattern than low interference level, we are can P aforesaid interference of reprocessing synthetic, and are shown as the back.
It is also noted that assessment algorithm can realize with the form of part or all of hardware and/or software.
M subtracter 7 1-7 MEach from separately one of M signal of communication being received with the TDMA pattern, deduct the interference of being synthesized by circuit 3.M subtracter 7 1-7 MOutput be used in M threshold detector 8 1-8 MInput separately on, they each produces the symbol sebolic addressing of a TDMA pattern communication separately, the interference that produces from the OCDMA pattern communication has therein been subdued basically.
M threshold detector 8 1-8 MOutput separately be applied to disturbing the input of combiner circuit 9, this circuit is by N subtracter 4 1-4 NOne, on each of N output separately, produce an interference signal of subduing one of separately from OCDMA demodulation first-harmonic section signal of communication.N subtracter 4 1-4 NOutput be applied to threshold detector 5 1-5 NInput separately on.Each threshold detector produces the symbol sebolic addressing of an OCDMA pattern communication separately, and the interference of TDMA pattern communication generation has therein been subdued basically.
As the result of aforementioned processing, one side threshold detector 5 1-5 NOutput and threshold detector on the other hand 8 1-8 NOutput come on the one hand obtainedly from the traffic symbols sequence of OCDMA pattern, come obtainedly on the other hand from the TDMA pattern, for these output, interference level is lowered basically.
At least can repeat aforesaid processing for one of communication pattern.This passes through to disturb combiner circuit 6, subtracter 10 in the sketch of Fig. 4 1-10 MWith threshold detector 11 1-11 MBe implemented.Disturb combiner circuit 6 to receive N threshold detector 5 1-5 NOutput separately.Circuit 6 uses one to disturb evaluation algorithms, and this interference is to be produced by being integrated on each tdma communication passage of OCDMA signal.M subtracter 10 1-10 MDeduct the interference that each circuit 6 is synthesized separately one of M the signal of communication that is received from the TDMA pattern, interference subtraction is handled and has been performed for the first time therein.M subtracter 10 1-10 MOutput be applied to M threshold detector 11 1-11 MIn the input separately, each of detector produces a symbol sebolic addressing of tdma communication separately, and the interference that has OCDMA communication to produce has therein been subdued basically.
Therefore the step below using:
-synthetic first pattern, all communications that are OCDMA here are TDMA in each second pattern here, the interference that produces in the communication.And this first interference is deducted from this second pattern TDMA.Synthetic then all second pattern communications, i.e. TDMA, the interference that in each communication of the first pattern OCDMA, is produced.And this interference is deducted from each communication of OCDMA pattern.
For increasing the quality of the communication that is received,, use the following step for the repetition of P=2:
(1)-in first substep, by using according to the ruling (5 on the value of symbol of these communications of first technology 1-5 N), synthetic (6) the 2nd interference separately that in each communication, produced of the communication of with good grounds first technology according to second technology, these ruling are to obtain at previous 1 second substep, deduct (10 from the communication separately according to first technology then 1-10 N) the 2nd interference, and deducting (10 from described each communication according to second technology 1-10 N) determine (11 after the 2nd interference 1-11 M) each value of symbol according to second technical communication;
(2)-in one second substep, by using according to the ruling (11 on the value of symbol of these communications of second technology 1-11 N), it is synthetic that (synthesizer that is not illustrated is usually at threshold detector (11 1-11 N) afterwards) and the 2nd interference separately that in each communication, produced of the communication of with good grounds second technology according to first technology, these ruling are to obtain at aforementioned first substep (1), deduct the 2nd interference from communication separately then, and after deducting the 2nd interference, determine each value of symbol according to first technical communication from described each communication according to first technology according to first technology;
And the interference for arbitrary value is then being carried out.
Therefore, for one strictly greater than 2 a certain value P,
(1)-in first substep, by using according to the ruling on the value of symbol of these communications of first technology, P the interference separately that the communication of synthetic with good grounds first technology is produced in each communication according to second technology, these ruling are that second substep at previous (P-1) obtains, deduct this P interference from communication separately then, and deduct this P interference from described each communication after, determine each value of symbol according to second technical communication according to second technology according to first technology;
(2)-in one second substep, by using according to the ruling on the value of symbol of these communications of second technology, P the interference separately that the communication of synthetic with good grounds second technology is produced in each communication according to first technology, these ruling are to obtain at aforementioned first substep (1), deduct this P interference from communication separately then, and deduct this P interference from described each communication after, determine each value of symbol according to first technical communication according to first technology according to first technology;
According to invention, in central location and unit 20 1-20 NBetween N first communication be established according to the first technology OCDMA.And can be used to set up one when being additional to these N communications of having set up when the resource of using this first technology without any one, one is used different access technologies, according to Fig. 4 is TDMA, new communication just be established, and its uses identical with first technology or frequency spectrum partly.Therefore use a resource allocation algorithm according to the invention needs, for example by central location 15.For this reason, a resource, for example a bi-directional communication channels of using the first technology OCDMA according to a realization, is dedicated to request and resource allocation signal according to the known solution of background technology.
Although in aforesaid description, most preferred embodiment is corresponding to the combination of OCDMA and TDMA technology, in fact, N first communication can be according to TDMA, OCDMA, the orthogonal waveforms multiple access of some first technology is re-used in the multiple access technology set that OFDMA and MC-OCDMA technology are constituted, and M is additional in these N that set up the communications by according to TDMA, OCDMA, the orthogonal waveforms multiple access of some second technology is re-used in the multiple access technology set that OFDMA and MC-OCDMA technology are constituted, and this second multiple access technology is different with first multiple access technology.
Therefore, for example with reference to Fig. 5, first multiple access technology uses TDMA, and second multiple access technology uses the OCDMA technology.In this case, for M OCDMA communication, receiver comprises M adjuster 1 1-1 M
As shown in Figure 6, each remote unit 20 1-20 NWith 21 1-21 MComprise first emittor/receiver 33 according to the first pattern work, and second emittor/receiver 34 according to the second pattern work.An administrative unit 35 is responsible for producing resource allocation application request therein in remote unit, so that remote unit enters wireless communication system.It produces resource allocation request for this reason, this request is sent to for example emittor/receiver 33, being launched on a special channel of a bi-directional communication channels of using an OCDMA technology by this transmitter, and this passage or channel are dedicated to request and resource allocation signal according to the known solution of background technology.
This request is received by emittor/receiver 30 by the administrative unit in central location 15 32, it sends a resource allocation information, that resource use that is assigned with or OCDMA or TDMA technology according to the availability of N resource of first multiple access technology.Central location 15 also comprises this first emittor/receiver 30 according to one first pattern work, and second emittor/receiver 31 according to the second pattern work.Administrative unit 32 comprises one for two-mode, for example OCDMA and TDMA, each the table of Resource Availability.Unit 32 uses these tables so that according to the availability of N resource of first multiple access technology, send a resource allocation information, that resource use or OCDMA technology or TDMA technology of being assigned with.
The reader will notice, on the one hand in central location 15, between first emittor/receiver 30 and second emittor/receiver 31 according to the second pattern work according to the first pattern work, on the other hand in remote unit, between first emittor/receiver 33 and second emittor/receiver 34 according to the second pattern work according to the first pattern work, those are established with reference to Fig. 4 or 5 described being connected between the receiver.
It is also noted that the receiver of Fig. 4 or 5, although its each illustrate by circuit with being simplified, for example the interference combiner circuit 3 and/or 6 and/or 9 of " series connection " work also can use an identical physical circuit to realize in these interfered circuits 3 and/or 6 and/or 9.Same subtraction function also can be by different subtracters, and threshold detector is realized.In the case, these circuit " parallel connection " work.And all these circuit can be completely or the realizing with software of part.
At last, the person of ordinary skill in the field will agree, although invention is described to realize with respect to the best of OCDMA/TDMA pattern combination, this also can be changed by the simple application of background technology knowledge, to cover TDMA, OCDMA uses the combination of some patterns of two patterns in the set of OFDMA and MC-OCDMA pattern, be different between the two-mode.

Claims (8)

1. a central location (15) and remote unit (20 that is used at orthogonal waveform multiple access network 1-20 N21 1-21 M) between increase the method for number N for the M of the communication of being set up, M is some more than or equal to 1 integer, N be one more than or equal to 2 integer, described in view of the above N first communication is that basis is by TDMA, OCDMA, the orthogonal waveforms multiple access of first technology in the multiple access technology set that OFDMA and MC-OCDMA access technology constitute is re-used, it is characterized in that described M communication that is additional on the individual communication of having set up of N is that basis is by TDMA, OCDMA, the orthogonal waveforms multiple access of second technology in the multiple access technology set that OFDMA and MC-OCDMA access technology constitute is re-used, this described second multiple access technology is different from first multiple access technology, and uses all or part of of the employed frequency range of first technology.
2. according to the method for claim 1, it is characterized in that:
First interference that with good grounds first access technology of-synthetic (3) institute is produced in each communication according to second multiple access technology,
-from each communication according to second multiple access technology deduct (71-7M described first disturbing of producing of all signal posts of with good grounds first multiple access technology,
First interference that the with good grounds second multiple access technology communication of-synthetic (9) institute is produced in each communication according to first multiple access technology,
-deduct (4 from each communication according to first multiple access technology 1-4 N) the signal post of with good grounds second multiple access technology produce this first disturb.
3. according to the method for claim 2, it is characterized in that mode with iteration, for some more than or equal to 2 P,
(1)-in first substep, each according to the communication of second technology on the individual interference separately of P that produces of the signal post of with good grounds first technology of synthetic institute, this is to realize according to the judgement on the value of symbol in the communication of first technology at these by utilizing, value of symbol is to obtain in one second substep of last (P-1), from communication separately, deduct this P interference then according to first technology, after from described each communication, deducting this interference P, determine each value of symbol according to the communication of second technology according to second technology;
(2)-in one second substep, each according to the communication of first technology on the individual interference separately of P that produces of the signal post of with good grounds second technology of synthetic institute, this is to realize according to the judgement on the value of symbol in the communication of second technology at these by utilizing, value of symbol be in front in first substep obtain, from communication separately, deduct this P interference then according to first technology, after from described each communication, deducting this P interference, determine each value of symbol according to the communication of first technology according to first technology.
4. one kind comprises at least one central location (15) and a plurality of remote unit (20 1-20 NWith 21 1-21 M) cordless communication network, therein when at N first remote unit (20 1-20 N) and central location (15) between N first communication when being set up respectively, described N first communication is that basis is by TDMA, OCDMA, have in the multiple access technology set that OFDMA and MC-OCDMA access technology constitute that the orthogonal waveforms multiple access of first technology of N resource is re-used, at least one be additional to N communication of communicating by letter by remote unit at least one second remote unit (21 1-21 M) and described central location (15) between, according to by TDMA, OCDMA, the orthogonal waveforms multiple access of second technology in the multiple access technology set that OFDMA and MC-OCDMA access technology constitute is established, this described second multiple access technology is different from first multiple access technology.
5. the unit (15 of a cordless communication network; 20 1-20 N, 21 1-21 M), it is characterized in that it comprises one according to TDMA, OCDMA, first emittor/receiver (30 of the technical work one of in the set of multiple access technology that OFDMA and MC-OCDMA technology are constituted, 33) and one use all or part of of the first technology similar frequency bands and according to TDMA, OCDMA, second emittor/receiver (31,34) of another technical work in the multiple access technology set that OFDMA and MC-OCDMA technology are constituted.
6. central location (15) that meets the cordless communication network of claim 5, it and a plurality of remote unit (20 1-20 N21 1-21 M) communication, it is characterized in that it comprises a distributor (32) that is used to distribute a resource, perhaps according to TDMA, OCDMA, first technology in the multiple access technology set that OFDMA and MC-OCDMA access technology are constituted is perhaps according to TDMA, OCDMA, second technology in the set of multiple access technology that OFDMA and MC-OCDMA technology are constituted based on the availability of N resource of first access technology, is used all or part of of the first technology similar frequency bands.
7. wireless communication network unit that meets claim 5 is characterized in that it comprises:
-one first first synthesizer (3) that disturbs that in each communication, produces of the communication of with good grounds first access technology according to second access technology,
-one be used in each communication, deducting according to second access technology described first subtracter (7 that disturbs that produces of the signal post of with good grounds first access technology 1-7 M),
-one first another synthesizer (9) that disturbs of in each communication, being produced of the communication of with good grounds second access technology according to first access technology, and
-one be used in each communication, deducting according to first access technology described first another subtracter (4 that disturbs of producing of the signal post of with good grounds second access technology 1-4 N).
8. unit according to claim 7 is characterized in that it comprises, P is some more than or equal to 2 integer,
-for one first substep, one be used for each according to the communication of second technology on P synthesizer of P interference producing of the signal post of with good grounds second technology of synthetic institute, this is to realize according to the judgement on the value of symbol in the communication of second technology at these by utilizing, value of symbol is to obtain in one second substep of last (P-1), from communication separately, deduct this P interference then according to second technology, after from described each communication, deducting this interference P, determine each value of symbol according to the communication of second technology according to second technology;
-for one second substep, one be used for each according to the communication of first technology on P synthesizer of P interference producing of the signal post of with good grounds second technology of synthetic institute, this is to realize according to the judgement on the value of symbol in the communication of second pattern at these by utilizing, value of symbol be in front in first substep obtain, a subtracter is used for deducting this P interference from the communication according to first technology, after from described each communication, deducting this P interference, determine each value of symbol according to the communication of first technology according to first technology.
CN 00801350 1999-07-08 2000-07-06 Method for increasing capacity of orthogonal waveform multiple access network, and associated units Pending CN1317172A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR99/08840 1999-07-08
FR9908840 1999-07-08

Publications (1)

Publication Number Publication Date
CN1317172A true CN1317172A (en) 2001-10-10

Family

ID=9547860

Family Applications (1)

Application Number Title Priority Date Filing Date
CN 00801350 Pending CN1317172A (en) 1999-07-08 2000-07-06 Method for increasing capacity of orthogonal waveform multiple access network, and associated units

Country Status (5)

Country Link
EP (1) EP1118164A1 (en)
JP (1) JP2003504936A (en)
CN (1) CN1317172A (en)
AU (1) AU6294400A (en)
WO (1) WO2001005051A1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102474300A (en) * 2009-08-12 2012-05-23 阿尔卡特朗讯 Communications in OFDMA-based wireless radio networks
CN103856282A (en) * 2012-11-29 2014-06-11 武汉邮电科学研究院 Multiplexer and demultiplexer, transmitter and receiver, optical fiber communication system and methods

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100566201B1 (en) * 2002-04-22 2006-03-29 삼성전자주식회사 Method for ranging in mobile communication system using orthogonal frequency division multiple access scheme
US20060203793A1 (en) * 2005-03-09 2006-09-14 Lucent Technologies, Inc. Method for increasing capacity in a wireless communications system
IL203785A (en) 2007-09-12 2014-07-31 Qualcomm Inc Capacity increasing devices and methods for wireless communication
EP2772999A1 (en) 2013-02-28 2014-09-03 CMP Products Limited Cable retaining apparatus

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5974101A (en) * 1992-04-28 1999-10-26 Canon Kabushiki Kaisha Spread spectrum modulation communication apparatus for narrow band interference elimination
JPH05327658A (en) * 1992-05-25 1993-12-10 Canon Inc Spread spectrum communication equipment, transmission state detector and radio communication equipment
CA2230231C (en) * 1996-11-29 2002-01-15 Mitsubishi Denki Kabushiki Kaisha Apparatus for removing shared waves
DE69941741D1 (en) * 1998-01-22 2010-01-14 British Telecomm Reception of narrow band interference speiseband signals

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102474300A (en) * 2009-08-12 2012-05-23 阿尔卡特朗讯 Communications in OFDMA-based wireless radio networks
CN102474300B (en) * 2009-08-12 2014-05-21 阿尔卡特朗讯 Communications in OFDMA-based wireless radio networks
CN103856282A (en) * 2012-11-29 2014-06-11 武汉邮电科学研究院 Multiplexer and demultiplexer, transmitter and receiver, optical fiber communication system and methods
CN103856282B (en) * 2012-11-29 2017-04-26 武汉邮电科学研究院 Multiplexer and demultiplexer, transmitter and receiver, optical fiber communication system and methods

Also Published As

Publication number Publication date
EP1118164A1 (en) 2001-07-25
AU6294400A (en) 2001-01-30
WO2001005051A1 (en) 2001-01-18
JP2003504936A (en) 2003-02-04

Similar Documents

Publication Publication Date Title
CN1113489C (en) Telecommunication network having time orthogonal wideband and narrowband systems
US9491761B2 (en) Full duplex communication system using disjoint spectral blocks
RU2407230C2 (en) Frequency-selective and frequency-separated transmission in wireless communication system
KR100464360B1 (en) Apparatus and method for efficiently energy distributing over packet data channel in mobile communication system for high rate packet transmission
KR100965723B1 (en) Method for mapping resource of physical downlink control channel of wireless communication system and apparatus for transmitting/receiving physical downlink control channel mapped thereby
EP1763933B1 (en) Different orthogonal code sets with members in common
US6563808B1 (en) Apparatus for incorporating multiple data rates in an orthogonal direct sequence code division multiple access (ODS-CDMA) communications system
CN1066596C (en) CDMA transmission system
CN1168243C (en) Apparatus and method for generating scrambling code in UMTS communication system
CN102724032B (en) Method and apparatus for transmitting and receiving information of an uncoded channel in an orthogonal frequency division multiplexing system
CN1082754C (en) Communication resource allocation method and apparatus
CN1144484C (en) Improvement for CDMA telecommunication system
KR100804920B1 (en) Communications system employing orthogonal frequency division multiplexing based spread spectrum multiple access
RU2006114704A (en) METHOD AND DEVICE FOR ALLOCATING SUB-CHANNELS IN THE SYSTEM OF COMMUNICATION OF MULTIPLE ACCESS WITH ORTHOGONAL DIVISION OF FREQUENCIES (OFDMA)
CN103004242A (en) Orthonormal time-frequency shifting and spectral shaping communications method
EP0211460A2 (en) Digital radio transmission method
CN1252189A (en) Multi-user communication system architecture with distributed transmitters
CN1290439A (en) Channel assigning device and method in CDMA communication system
US20050180375A1 (en) System and method for channelization and data multiplexing in a wireless communication network
CN1150709C (en) Speed band-enlarging and-deenlarging method for two-stage code converter chips in CDMA cellular system
CN1118150C (en) Device and method for spreading channels in mobile communication system
YANG et al. Uplink multiple access schemes for 5G: A survey
CN1378723A (en) Framing method are synchronous wireless system therewith
CN1295393A (en) Method of adding CDMA network capacity and correlation unit
CN1162994C (en) Method and apparatus for transmitting and receiving high speed data using CDMA channels

Legal Events

Date Code Title Description
C06 Publication
PB01 Publication
C10 Entry into substantive examination
SE01 Entry into force of request for substantive examination
C02 Deemed withdrawal of patent application after publication (patent law 2001)
WD01 Invention patent application deemed withdrawn after publication