CN100539719C

CN100539719C - Methods for Coding that in multi-user comm, strengthens and device

Info

Publication number: CN100539719C
Application number: CNB2004800104397A
Authority: CN
Inventors: 拉吉弗·拉罗拉; 穆拉里·萨利尼瓦森; 厉隽怿
Original assignee: Qualcomm Inc
Priority date: 2003-02-19
Filing date: 2004-02-19
Publication date: 2009-09-09
Anticipated expiration: 2024-02-19
Also published as: CN101631381A; CN1778121A; CN101631381B; CN1778082A; CN1778082B; UA85181C2

Abstract

Use comprises the relatively large transmission block of a plurality of minimum transmission units (MTU), launches first and second groups of information, and wherein each MTU is corresponding to unique combination of resources.First group of described MTU is used to transmit described first group of information, and described first group of MUT comprises the major part at least of the described MTU in the transmission block.Second group of described MTU for example selected in definition, and being used to transmit described second group of information, described second group of MTU comprises with first group and compare less MTU, and at least some MTU are included in first group.Be included at least some MTU among the described first and second groups MTU and the corresponding informance modulation arranged thereon by emission, transmit first and second groups of information.Can come transmission information by stack first and second information on shared MTU.

Description

Methods for Coding that in multi-user comm, strengthens and device

Technical field

The present invention is directed in wireless communication system improving one's methods of coding and emission information.

Background technology

Supercomposed coding in multi-user comm will be discussed now.Multi-user comm comprises some transmitter and receivers of intercommunication mutually, and can use one or more communication meanss.In general, multi-user communication method can be classified as one of two kinds of situations:

(a) individual transmitter is communicated by letter with some receivers, and it is commonly called broadcast communication method, and

(b) some transmitters are communicated by letter with a public receiver, and it is commonly called the multiple access communication means.

Broadcast communication method is commonly called " broadcast channel " in the command, control, communications, and information treatise is done, and will so be called in the remaining part of this document.Described " broadcast channel " refers to the physical communication channels between transmitter and a plurality of receiver and communicated and the communication resource that uses by transmitter.Similarly, the multiple access communication means is popularly called " multi-access channels ", and the remaining part of this document will use this term.Equally, described " multi-access channels " refers to the physical communication channels between a plurality of transmitters and public receiver, and the communication resource that is used by transmitter.Broadcast communication method usually is used for implementing the downlink communication channel of typical cellular wireless system, wherein broadcast to a plurality of wireless terminals the base station, and the uplink channel in this system uses the multiple access communication means to implement usually, and wherein a plurality of wireless terminals can be to a base station signaling.

Transmission resources in the multi-user comm can be represented on time, frequency or code space usually.Information theory shows especially, in identical transmission resources, for example simultaneously in identical frequency, under the situation of broadcast communication method by launching simultaneously to a plurality of receivers, perhaps under the situation of multiple access communication means by allowing a plurality of transmitters to launch simultaneously, can increase the capacity of system in both cases.Under the situation of broadcast communication method, be used for being also referred to as " supercomposed coding " to the technology that a plurality of users launch simultaneously at identical transmission resources.In background of the present invention, controlled superposition coding all shows as a kind of valuable practical technique in broadcasting and multiple access communication means.

In view of the following discussion that is used for the lift-off technology of broadcast communication method, the advantage of supercomposed coding will be conspicuous.The consideration individual transmitter is communicated by letter with two receivers, and their channel can be by the horizontal N of environment Gaussian noise ₁And N ₂Describe, wherein N ₁＜N ₂, promptly to compare with second receiver, first receiver has stronger channel.Suppose transmitter can with the communication resource be total bandwidth W, and gross power P.Transmitter can adopt some strategies to communicate by letter with receiver.Fig. 1 comprises a figure 100, and it has been described under three kinds of different emission strategies, and first user and second user accessible speed in broadcast channel that more weak receiver is arranged than strong receiver are arranged.The speed of the receiver that the longitudinal axis 102 expressions of Fig. 1 are stronger, and transverse axis 104 is represented the speed of more weak receiver.

At first, consider in time that transmitter multiplexed strategy between two receivers distributes its all resource to a receiver at every turn.If represent and the time portion of first (stronger) receiver signal post cost by α, it be easy to show that then two accessible speed of user satisfy

R_{1} \leq α W \log (1 + \frac{P}{N_{1}})

R_{2} \leq (1 - α) W \log (1 + \frac{P}{N_{2}})

Along with the variation of serving the time portion α that first user spent, represent with the straight line 106 of representing the Time Division Multiplexing strategy among Fig. 1 by the speed that above-mentioned formula reaches.Consider now another emission strategy, wherein transmitter distributes certain part of bandwidth, β, and the part of available horsepower, α to first user.Second user obtains the remainder of bandwidth and power.Distributed after these parts, two receivers of transmitter and this are communicated by letter simultaneously.Under this emission strategy, the feature of velocity band can be by following formulate.

R_{1} \leq β W \log (1 + \frac{αP}{N_{1}})

R_{2} \leq (1 - β) W \log (1 + \frac{(1 - α) P}{N_{2}})

Represent that from Fig. 1 the sectional curve 108 of the projection of frequency division multiplexing (FDM) strategy can see the speed that is reached by above-mentioned formula intuitively.Clearly between two users, distribute of the time-division of the strategy of available horsepower and bandwidth by rights better than resource.Yet described second strategy still is not optimum.

The supremum of accessible velocity band is the broadcast capacity zone under all emission strategies.For the situation of Gaussian noise level, this regional feature is by formula

R_{1} \leq W \log (1 + \frac{αP}{N_{1}})

R_{2} \leq W \log (1 + \frac{(1 - α) P}{αP + N_{2}})

Represent, and describe by the imaginary curve 110 of expression capacity among Fig. 1.By IT-18 (1): 214,1972 IEEE information theory journal, broadcast channel, the ThomasCover among the T.M.Cover point out that the communication technology that is called as supercomposed coding can reach this capacity region.In this technology, use in identical transmission resources and the different power of mutual superposition is transmitted into the signal of different user.Surpass any other by the accessible gain of supercomposed coding and need between different users, share the communication technology of transmission resources.

The basic conception of supercomposed coding is shown in the figure 200 of Fig. 2.Figure 200 comprises the longitudinal axis 202 of an expression quadrature and the transverse axis 204 of an expression homophase.Although this example adopts the QPSK modulation, in general the selection of modulation setting is unrestricted.And this example has been summarized two users' situation, but this notion can be generalized to a plurality of users in simple mode.Total transmit power budget of supposing transmitter is P.Suppose first receiver, be called as " more weak receiver ", bigger interchannel noise is arranged, and second receiver, be called as " stronger receiver ", less interchannel noise is arranged.Circle 205 expressions of four use pattern fills will be with high power (protecting) better, (1-a) P, and to the QPSK constellation point of more weak receiver emission, wherein arrow 206 provides high power QPSK the measurement of emissive porwer.Simultaneously, also use the QPSK constellation with low-power (less protection), α P, to the extra information of stronger receiver transmission, wherein arrow 207 provides the measurement of lower power QPSK emissive porwer.Make up the symbol of the actual transmission of these two high powers and low-power signal, in Fig. 2, be expressed as blank circle 208.The key that this legend is expressed is that transmitter uses identical transmission resources, communicates by letter simultaneously with these two users.In this document, high power signals is also referred to as shielded signal, and low-power signal is also referred to as conventional signal.

The strategy of receiver is quite simple.More weak receiver observes low-power signal stack high power QPSK constellation thereon.When more weak receiver decoding high power signals, may be not enough to analyze low-power signal by the signal to noise ratio (snr) of more weak receiver impression, so low-power signal shows as noise and has slightly reduced SNR.And on the other hand, by the SNR of stronger receiver impression be enough to analyze high power and low-power QPSK constellation point the two.The strategy of stronger receiver is the high-power point (it uses for more weak receiver for plan) of at first decoding, and removes their influence from composite signal, the low-power signal of decoding then.

Yet in fact, this strategy is not worked usually well.For the decoder that recovers low-power signal, any flaw of eliminating in the high power signals process all shows as noise.

Consider above-mentioned discussion, clearly need novel method and apparatus, it allows communication system to use the broadcasting and/or the multiple access communication means of controlled superposition coding to come work, thereby utilize the advantage of accessible fair speed in the channel, eliminate actual difficulty and complexity and the cost relevant that runs into of high power signals illy with the joint decoder method and overcome.

Summary of the invention

The present invention is directed to the transmitter and receiver technology that is used to encode, it makes the decoding of normal signal can carry out and need not to be damaged by the imperfect elimination of protected signal.

Under the environment of the cellular wireless data communication system of using OFDM (OFDM), exemplary embodiments of the present invention is described below.Although for explaining that purpose of the present invention used typical wireless system, the present invention is not limited to typical embodiment, and also can be applied to many other communication systems, for example system of employing code division multiple access (CDMA).

According to each embodiment of the present invention, use a transmission block to launch first and second groups of information, described transmission block comprises a plurality of minimum transmission units, each minimum transmission units is corresponding to unique combination of resources, and described resource comprises at least two in time, frequency, phase place and the spreading codes.Minimum transmission units is also referred to as the degree of freedom.In this document, use these two terms of the minimum transmission units and the degree of freedom interchangeably.When comparing with the minimum dimension transmission block of one of the information sets that will emission that can be required to encode, transmission block can be relatively large.

An exemplary embodiments of the present invention comprises that definition first group of described minimum transmission units is to be used to transmit described first group of information, described first group of minimum transmission units comprises the major part of the minimum transmission units in the described transmission block at least, second group that defines described minimum transmission units to be used to transmit described second group of information, and described second group of minimum transmission units comprises with first group compares less minimum transmission units; At least some minimum transmission units in first and second groups of minimum transmission units are identical; And use the minimum transmission units that is included in described first and second groups of minimum transmission units to transmit first and second groups of information.First group that is included in described minimum transmission units in the transmission block is used to transmit described first group of information, and described first group of minimum transmission units comprises the major part of the described minimum transmission units in the transmission block at least.Second group of described minimum transmission units for example selected in definition, and to be used to transmit described second group of information, described second group of minimum transmission units comprises with first group compares less minimum transmission units; At least some minimum transmission units in first and second groups of minimum transmission units are identical.Be included at least some minimum transmission units in described first and second groups of minimum transmission units and the corresponding informance modulation arranged thereon by emission, transmit first and second groups of information.The transmission of information can be passed through stack first and second information on shared minimum transmission units, or passes through to puncture first group of information so that launch second group of information on first and second groups of shared minimum information unit.Can use error correcting code to recover owing to second group of information that information is lost of stack on shared transmission unit.The information of launching in first and second groups of information can be, for example user data and comprising confirm and be distributed in control information.

First and second groups of information can, and at each embodiment really,, use first and second parts of minimum transmission units to launch by comprise minimum transmission units from different transmitters emissions corresponding to the modulation intelligence of different information sets.Transmitter can be arranged in for example wireless terminal of different equipment.In other embodiments, by from individual transmitter, base station transmitter for example, emission is used to transmit the minimum transmission units of first and second groups of information, transmits first and second groups of information.

First group of minimum transmission units comprises the major part of the minimum transmission units in the transmission block, but the minimum transmission units of higher proportion normally, for example in certain embodiments, first group of minimum transmission units comprises at least 75% of minimum transmission units sum, and sometimes, comprise 100% of minimum transmission units in described.Second group of minimum transmission units generally includes in the piece and is less than 50% minimum transmission units, and comprises less relatively minimum transmission units sometimes, for example is less than 5 or 10% of minimum transmission units quantity in the transmission block.In the case, the receiver that is used for transmitting the minimum transmission units of first group of information even attempt to decode does not recover any minimum transmission units of second group of transmission unit, but, also can recover to plan first group the information of on some minimum transmission units that are included in second group, launching in certain embodiments by using error correcting code.

By using the two shared minimum transmission units of first and second groups of minimum transmission units, correct stack can be used for transmitting the information of while corresponding to first and second groups of information.As an alternative, can puncture the information that (for example not launching) launches on shared minimum information unit corresponding to the plan of first group of information, simultaneously by using error correcting code can recover breakdown information.

In a specific exemplary embodiments, part as transmission course, can launch with first power level and use the described first and second groups of information be included in first group of at least some minimum transmission units in the minimum transmission units, use simultaneously and compare higher power level based on each minimum transmission units, with described first signal and launch minimum transmission units in described second group of minimum transmission units.Launch the power level of the minimum information unit in described second group, in some embodiments, at least than the power level big 3dB of emission corresponding to the minimum transmission units of first signal.Sometimes can, and really, change the power level of the minimum information unit in described first and second groups, for example with the variation of reflection channel status.

According to the present invention, the embodiment of various receivers is possible.Two receivers, for example first and second receivers can independently and concurrently turn round.In the minimum information unit from the described transmission block of actual transmission, a receiver is used to recover first group of information, and another receiver is used to recover second group of information.In such embodiment, first receiver will comprise that the minimal information piece corresponding to the signal of second group of information is considered as comprising impulsive noise, and for example abandon, ignores or minimize their influences to the output of receiver.In this embodiment, second receiver is considered as background noise with the influence corresponding to the signal of first group of information of the minimum transmission units that receives.Owing to use higher relatively power level usually, for example be enough to make first receiver this signal to be thought the power level of impulsive noise, launch signal corresponding to second group of information, even therefore show as under the situation of background noise, also be easier to recover secondary signal usually relatively at signal corresponding to first group of information.Because the influence of second group of information of emission is limited to symbol less relatively in the transmission block usually, trend towards localizing very much in the influence that is used to launch high power signals on the signal of first group of information, to allow as a rule being included in traditional error correcting code in the transmitter information, recover any drop-out by use.

In another embodiment of the present invention, a kind of device also comprises two receivers.Yet, be not the running of independent parallel ground, the identification of first receiver is corresponding to the minimum transmission units of second group of information, for example high power minimum transmission units.Then, it represents the information of the minimum transmission units of which reception corresponding to second group of information to the second receiver transmission.Second receiver abandons the minimum transmission units corresponding to second group of information, the minimum transmission units of the remaining reception of decoding then.Because the quantity of the minimum information unit that abandons trends towards less; for example be lower than as a rule reception minimum information unit 5%; second receiver is used to protect emission information to avoid owing to loss of minimum transmission units during launching or the error correcting code that error causes error code by use, usually first group of information that still can regain one's integrity.

In different embodiment, the present invention has realized the benefit of the supercomposed coding in multi-user comm, use simplicity of design simultaneously but with regard to behavior in service still good receiver.The invention discloses the two the effective supercomposed coding technology of novelty of broadcast channel and multi-access channels that is used for.

Under the situation of broadcast channel, for example, individual transmitter sends data to a plurality of receivers.In the environment of canonical system, transmitter is the base station that communicates with wireless receiver (for example mobile receiver) in cellular downlink.Because the variation of the path loss of the position of basis within the unit, the mobile subscriber in the cellular system can experience various SNR states.There are two different mobile receivers signals of wanting with two different path losses of impression of communicating by letter simultaneously the supposition base station with being without loss of generality.Normal signal is intended to that receiver for the higher signal to noise ratio (snr) of impression uses, and below is referred to as " stronger " receiver.Term is the secondary signal of " shielded " signal, is intended to use for " more weak " receiver that turns round with lower SNR on low-qualityer channel.Mobile receiver being categorized as " stronger " or " more weak ", is not static, but relative defining.

If do not use supercomposed coding, should between signal routine and shielded, distribute air link resources so, this is not optimum.In order to distinguish disclosed in the present invention new supercomposed coding method, after this in the remaining part of this document, will be called " traditional supercomposed coding " in the existing supercomposed coding method that background parts is described.In traditional supercomposed coding environment, use identical air link resources, launch shielded signal and normal signal simultaneously.For example, suppose that being used for launching simultaneously the conventional air link resources with shielded code word comprises K symbol, A ₁..., A _KAnd suppose that conventional code word will transmit M information bit, shielded code word will transmit N information bit.That supposes routine all uses BPSK (two-phase PSK) modulation with shielded code word.In traditional supercomposed coding, by encoding scheme convolutional encoding for example, M routine information bits switch become K coded-bit, then, this K coded-bit is mapped to K BPSK symbol B ₁..., B _KSimultaneously,, convert N shielded information bit to a different K coded-bit, then, this K coded-bit is mapped to K BPSK symbol C by another encoding scheme convolutional encoding for example ₁..., C _KAt last, combination is from K BPSK symbol of shielded information bit with from K BPSK symbol of routine information bit, and K air link resources symbol A of use ₁..., A _K: A ₁=B ₁+ C ₁..., A _K=B _K+ C _KWith its emission.In composite signal, launch shielded symbol with the higher power of each bit usually, so that more weak receiver can receive them reliably.Symbol with the relatively low power emission routine of each bit.In this example, and in essence in general, the energy of normal signal will be launched thereon between all degrees of freedom of shielded signal and distribute.

In the more weak receiver such mode of shielded code word that is merely able to usually decode, select the power of transmitter.Concerning this receiver, normal signal only shows as noise.And on the other hand, stronger receiver this two kinds of code words of should decoding.The good decoding policy that a kind of stronger receiver can adopt is this two code words of attempting to decode together.Yet for the receiver of reality, this is too complex often.Therefore, the strategy of the stronger common employing of receiver is decoding in succession.The stronger receiver shielded code word of at first decoding is removed it then from the composite signal that receives, the conventional code word of decoding at last, and this is to the significant code word of stronger receiver.Yet in fact, above-mentioned elimination and decoding scheme in succession can not always be finished well.If the SNR of stronger and more weak receiver is so so that signal conventional and stack is launched with roughly the same power with the speed that requires communicate by letter, so, eliminate shielded code word and may be difficult or inaccurate.

In fact, even when emitted power is different on these two code words, also exist the obstacle of decoding in succession.For example, most of communication systems are experienced the intrinsic noise of a certain degree at the receiver place.Be different from additive noise, this intrinsic noise usually with the signal correction of launching, and have and the proportional energy of emitted power.Channel estimation noise in the wireless communication system is an example of intrinsic noise.In traditional supercomposed coding environment, channel estimation noise causes the faulty elimination of shielded signal at stronger receiver.Remaining elimination probable bit error has sizable energy, especially when comparing with the low-power superposed signal.Therefore, consider remaining elimination error code, the possibly conventional code word of can't correctly decoding of stronger receiver.

By described discussion as can be known, clearly, although traditional supercomposed coding distributes the energy of shielded code word in each degree of freedom, it is desirable concentrating this energy between one or several degree of freedom.According to the present invention, on the degree of freedom of limited quantity, concentrate energy, be convenient to easily detect and eliminate shielded signal, even when to be included in whole emitted energies in these two signals be similar at receiver.According to the present invention, the concentration of energy in the code word is between one or several degree of freedom.

Use above-described coding and launching technique, can use one group of shared overlapping communication resource, for example time, frequency and/or code are launched multipacket message.In view of following detailed description, many extra features of the present invention and benefit will be conspicuous.

Description of drawings

Fig. 1 has described one and has been illustrated under three kinds of different emission strategies, and first user and the figure that second user accessible speed in broadcast channel of more weak receiver is arranged than strong receiver are arranged.

Fig. 2 represents to use the example of the supercomposed coding of QPSK modulation.

Fig. 3 represents the example of a pulse position modulation.

Fig. 4 represents an example according to high speed supercomposed coding of the present invention.

Fig. 5 represents another example according to high speed supercomposed coding of the present invention, and wherein blinker is concentrated its energy on 4 character positions.

Fig. 6 represents according to the present invention, the typical high speed supercomposed coding in multi-access channels, and it is expressed as a composite signal at base station receiver.

Fig. 7 represent typical service part and by the base station to user's distribution service part.

Fig. 8 represents the exemplary allocations part corresponding to service part.

Fig. 9 represents typical downlink traffic part and confirms part.

Figure 10 represents typical distribution portion, downlink traffic part and confirms part, wherein distributes and confirm and partly all use according to high speed supercomposed coding of the present invention.

Figure 11 represents that according to the transmission block of 2 groups of typical information of the present invention, a minimum transmission units (MTU) and partly overlapping minimum transmission units group it can be used for defining information sets and can partly or entirely be used to transmit with transmission information.

Figure 12 represents the transmission block according to another typical MTU of the present invention, and it represents that this transmission block can be subdivided into sub-piece.

Figure 13 represents to have according to a kind of use of the present invention the distinct device of different transmitters, launches two methods corresponding to the signal of two groups of information, and wherein each transmitter generates the signal corresponding to one group of information.

Figure 14 represents the method according to two groups of information of other two kinds of emissions of the present invention, perhaps use the individual transmitter of two signals of output, wherein each signal perhaps uses at inner combined signalling to export the individual transmitter of single composite signal corresponding to the information in one group of information.

Figure 15 represents the equipment that comprises a filtering and a correction module according to two kinds of the present invention; Every kind of equipment comprises two receivers, and every kind of equipment can be used for receiving composite signal and retrieves two groups of information of having launched.

Figure 16 represents to comprise according to another kind of the present invention the equipment of a MTU signal identification module; Described equipment comprises two receivers, and described equipment can be used for receiving composite signal and retrieves two groups of information of having launched.

Figure 17 represents a kind of exemplary communications systems of implementing apparatus and method of the present invention.

Figure 18 represents a kind of according to exemplary base station of the invention process.

Figure 19 represents a kind of according to exemplary end node of the invention process (wireless terminal).

Embodiment

Figure 17 represents the exemplary communications systems 1700 of a kind of use according to apparatus and method of the present invention.Exemplary communications systems 1700 comprises a plurality of base stations, and (BS 1) 1702, base station 1 and base station N (BS N) 1702 ' are arranged.BS 1 1702 is connected respectively to a plurality of terminal nodes (EN) via Radio Link 1712,1714, EN 1 1708, EN N 1710.Similarly, with BS N 1702 ' via Radio Link 1712 ', 1714 ' be connected respectively to a plurality of terminal nodes (EN), EN 11708 ', EN N 1710 '.Unit 1 1704 represent BS 1 1702 can with EN, for example EN1 1708, the wireless coverage area that communicates.Unit N 1706 represent BS N 1702 ' can with EN, EN 1 1708 ' for example, the wireless coverage area that communicates.EN 1708,1710,1708 ' and 1710 ' can move in communication system 1700 everywhere.Base station BS 1 1702, BS N 1702 ' are connected to a network node 1716 via network link 1718,1720 respectively.Network node 1716 is connected to other network node via network link 1722, and for example other base station, router, home agent node, checking are authorized (AAA) server node etc. that charges, and are connected to the internet.Network link 1718,1720,1722 can be an optical cable for example.Network link 1722 provides the interface outside the communication system 1700, to allow for example node communication outside EN and the system 1700 of user.

Figure 18 represents a kind of according to exemplary base station 1800 of the present invention.Exemplary base station 1800 can be Figure 17 base station 1702,1702 ' more detailed description.Exemplary base station 1800 comprises a plurality of receivers that link together via bus 1826, receiver 1 1802, receiver N 1804, a plurality of transmitters, transmitter 1 1810, transmitter N 1814, processor 1822 is CPU for example, I/O interface 1824 and memory 1828.Each

unit

1802,1804,1810,1814,1824 and 1828 can pass through bus 1826 swap datas and information.

Receiver 1802,1804 and transmitter 1810,1814 are connected respectively to antenna 1806,1808 and 1818,1820, thereby for base station 1800 provides a path, with within its cellular coverage with terminal node for example wireless terminal communicate for example swap data and information.Each receiver 1802,1804 can comprise a decoder 1803,1805 respectively, to receive the decode by the terminal node coding of working within its unit and the signaling of emission.Receiver 1802,1804 can be any one or its variation, for example receiver (1506,1508), (1536,1538), (1563,1564) of the typical receiver shown in the equipment 7 1562 of the equipment 6 1532 of equipment 5 1502, Figure 15 of Figure 15 or Figure 16.According to the present invention, receiver 1802,1804 should receive the composite signal that comprises a routine or a basis signal and a blinker, and retrieval is corresponding to the original information sets of launching information sets in advance.Each transmitter 1810,1814 can comprise the encoder 1812,1816 of a coding signaling before emission.Transmitter 1810,1814 can be any one or its variation, for example transmitter (1304 and 1310), (1404), (1412) of the exemplary transmitter shown in the equipment 4 1410 of the equipment 3 of the equipment 1 1302 of Figure 13 and equipment 21308, Figure 14 or Figure 14.According to the present invention, transmitter 1802,1805 should be launched one or more following: routine or basis signal, blinker and/or composite signal.

Memory 1828 comprises routine 1830 and data/information 1832.Processor 1822 is by the routine in the execute store 1,828 1830 and use the operation of the data/information 1832 control base stations 1800 in the memory 1828, with

operation receiver

1802,1804, transmitter 1810 and I/O interface 1824, carry out the basic base station functions of processing controls, and control and implement new feature of the present invention and improvement, comprise generating and the emission composite signal, receiving composite signal, composite signal is categorized as routine or basis signal information and blinker information, classification and recovering information.I/O interface 1824 provides one to the internet and other network node for base station 1800, for example, the interface of intermediate network node, router, aaa server node, home agent node etc., thereby allow the terminal node of communicating by letter with base station 1800 and other by Radio Link in communication system everywhere and for example via the brother of node of internet outside communication system, another terminal node for example connects, communication and swap data and information.

Routine 1830 comprises communication routines 1834, and base stations control routine 1836.Base stations control routine 1836 comprises a scheduler program 1838, error detection and correction module 1840, a transmitter control routine 1844 and a receiver control routine 1846.Data/information 1832 comprises the MTU information 1858 and the user data/information 1848 of the information 1 1850 of reception, the information N 1852 that receives, emission information 1 1854, emission information N 1856, identification.User data/information 1848 comprises a plurality of user profile, user's 1 information 1860 and user N information 1862.Each user profile, for example user's 1 information 1860 comprises terminal identifier (ID) information 1864, data 1866, channel quality report information 1868, partial information 1870 and classified information 1872.

Emission information 1 1854 can comprise one group can be corresponding to one first signal, for example, the information of routine or basis signal, definition can be used for launching the information of transmission block of the MTU of described first signal, definition will be used to define the information of first group of MTU of described signal, to modulate on described first group of MTU defining the information of described first signal, definition should be to wireless terminal emission for example corresponding to the information of which MTU of first signal message.In certain embodiments, each transmits the MTU of first group of information data with emission.In other embodiments, should launch most of MTU that transmits first group of information.In such an embodiment, before emission, can abandon corresponding to first group of information and simultaneously corresponding to second group of information, for example, the MTU of a blinker.

Emission information N 1856 can comprise one group can be corresponding to a secondary signal, for example, the information of blinker, definition for example can be used for launching to a wireless terminal information of transmission block of the MTU of described secondary signal, definition will be used to define the information of second group of MTU of described secondary signal, will modulate to define the information of described secondary signal on described second group of MTU.Described first and second transmission blocks can be identical.In this case, can, and usually, the specification of the appointment common transmitted piece of the information of spontaneous emission in the future 1854,1856 and/or the transmission block information of shape are kept at respectively in the memory 1828.The information 1 1850 that receives comprises first group of information of recovering from receiver 1 1802, for example corresponding to the information of launching information in advance of first group of wireless terminal.First group of information of recovering can, for example, from routine or basis signal, recover.The information N 1852 that receives comprises second group of information of recovering from receiver N 1804, for example corresponding to the information of launching information in advance of second group of wireless terminal.Second group of information of recovering can, for example, from blinker, recover.

Define the more shared public MTU of each original routine of launching information sets in advance and blinker.The MTU information 1858 of identification can comprise one group second or blinker in the MTU that discerns, the MTU group of the described identification that can obtain by the decoder 1805 of receiver N.The MTU information 1858 of identification can be transmitted to receiver 1 1802, wherein this receiver can be got rid of those MTU with before carrying out correction module at the signal that transmits reception, or as an alternative, the MTU information 1858 of identification can be transmitted to error detection in the memory and error detection and the correction module in correction module 1840 and/or the decoder 1803.

Data 1866 can comprise the data that receive from terminal node and will be to the data of terminal node emission.In certain embodiments, a terminal identifier ID 1864 is used for N can put at one time and each of the interactional wireless terminal in base station.In the time of in entering a unit, give for example Termination ID 1864 of terminal node distribution of wireless terminal.Like this, along with wireless terminal enters and leave the unit, Termination ID will be used again.There is a set of dispense each base station to the terminal identifier (Termination ID) 1864 with serviced user (for example wireless terminal).The information that channel quality report information 1868 can comprise that base station 1800 judges about user's channel quality, and from the user comprise downlink channel quality report, interfere information, from the feedback information of the power information of wireless terminal.Partial information 1870 can comprise according to type of service, for example Traffic Channel, allocated channel, request channel; Characteristic, for example MTU, frequency/phase and time, OFDM key signature; The signal type that is used for part, for example conventional or basic with respect to blinker, define the information of the part of distributing to the user.Classified information 1872 comprises the user, and wireless terminal for example is categorized as the information of " stronger " or " more weak " transmitter.

Communication routines 1834 comprises that the one or more user terminal nodes that can be used in system provide special service, for example, and the various communications applications of IP phone service, text service and/or interactive game.

Base stations control routine 1836 is carried out and is comprised basic base stations control and the be controlled at interior function relevant with apparatus and method of the present invention.Base stations control routine 1836 is exercised to signal generation and reception, error detection and error correction, data and pilot frequency hopping sequence, I/O interface 1824, to user's distribution portion and control from users to Termination ID 1864 that arrange.More particularly, scheduler program 1838 is arranged users to Termination ID 1864, uses user's classified information 1872 and partial information 1870 to distribute various piece to the user.According to the present invention, which user and which scheduler program decision about should partly distributing to routine or basis signal with, and which user and which partly should be distributed to blinker.Other user limited with wishing to launch bulk information and available horsepower compares, the certain user, and for example those users that available high power arranged and will launch a little information may be more suitable for sending in blinker.The channel of some type may be more suitable in using blinker to send.For example, in many cellular communication systems, control channel is launched with broadcasting power, because they receive the mobile subscriber's of weak channel constraint.Blinker sends and to be very suitable for this application, and its use usually can cause power reduction and almost not have the loss of robustness.By using classified information 1872 and partial information 1870; scheduler program 1838 can match the user that low down link signal to noise ratio (snr) is arranged the conventional part within the channel, and has the user of high SNR to be complementary with (for example " the shielded ") part of flashing within the channel.

According to the present invention, transmitter control module 1844 is used the data/information 1832 that comprises emission information 1 1854, emission information N 1856, Termination ID 1864, data 1866 and partial information 1870, generates to transmit and control transmitter 1810,1814 operation.For example, transmitter control module 1844 can control transmitter 1810, via its encoder 1812, and the signal that becomes transmitter 1 1810 to launch the block coding that is included in the emission information 11854, for example routine or basis signal.Transmitter control module 1844 can be used the MTU group corresponding to emission information N 1856, and the block coding that is included in this information 1856 is become to flash or shielded signal.Emission control module 1844 can control transmitter N1814, via its encoder 1816, and the signal that becomes transmitter N 1814 to launch the block coding that is included among the emission information N 1856.For example, emission control module 1844 can be used the MTU group corresponding to emission information N 1856, and the block coding that is included in this information 1856 is become to flash or shielded signal.As an alternative, in the various embodiment of transmitter 1810,1814, can use individual transmitter, it is combination or mixed signal under the guidance of transmitter control module 1844 in internal condition emission information 1 1854 and emission information N 1856.This married operation can be included in before the emission, stack routine and blinker, and/or form a MTU emission group that comprises each blinker unit and be not included in the unit in the normal signal within the blinker selectively.

According to the present invention, the operation of receiver control module 1846

receiver control

1802,1804, to receive composite signal and to extract two groups of information, for example receiver information 1 1850 and receiver information N 1852.Reception under 1846 controls of receiver control module is handled and can be comprised

control decoder

1803,1805, and other unit within the receiver control.In certain embodiments, receiver control module 1846 is with

receiver

1802,1804 control impuls noise filterings, background noise filtering and correction module.In certain embodiments, the receiver control module is being controlled at a receiver, for example, secondary signal MTU identifier module among the receiver N 1804, and at another receiver, for example, the discard module in the receiver 1 1802, and from the MTU information 1858 of receiver N 1804 to receiver 1 1802 transmission identifications; This allows receiver 1 1802 to remove the MTU that comprises blinker information from the information flow that enters the error detection module of attempting to recover the normal signal information sets.

Correction module 1840 associating or substitute one and can be included in error detection in the

receiver

1802,1804 and correction module and work.The error detection and the error correcting capability that are included in

receiver

1802,1804 and/or the module 1840 allow base station 1800 to reproduce corresponding to the information sets of launching information sets in advance, signal has been subjected to the stack of second blinker (blinker) or the punch-through that is produced by secondary signal (blinker) even information sets (conventional or basis) is launched in expression in advance, for example, replace the influence of some MTU.In some embodiments, fully cover MTU corresponding to the MTU of second group of information corresponding to first group of information.In addition in certain embodiments, the MTU corresponding to first group of information takies a transmission block fully.

Figure 19 represents a kind of according to exemplary end node of the present invention (wireless terminal) 1900.Exemplary end node 1900 can be used to the terminal node 1708,1710,1708 of Figure 17 ', 1710 ' in any one.Exemplary end node 1900, for example wireless terminal can be a portable terminal, mobile phone, mobile node, fixed wireless device etc.In this application, quoting of terminal node 1900 can be interpreted as corresponding to any one wireless terminal, mobile node etc.Wireless terminal can be the mobile node or the permanent plant of support of wireless communication link.Exemplary end node 1900 comprises a plurality of receivers that link together via bus 1928, receiver 1 1902, receiver N 1904, and a plurality of transmitters, transmitter 1 1910,1912, one processors 1926 of transmitter N are CPU for example, and memory 1930.By bus 1928, each

unit

1902,1904,1910,1912,1926,1930 can swap data and information.

Receiver 1902,1904 and transmitter 1910,1912 are connected respectively to antenna 1906,1908 and 1914,1916, thereby for terminal node for example wireless terminal 1900 path is provided, with with the cellular coverage of wireless terminal 1900 work under base station 1800 communicate for example swap data and information.Each receiver 1902,1904 can comprise a decoder 1918,1920 respectively, to receive the decode the signaling by base station 1800 codings and emission.Receiver 1902,1904 can be any one or its variation, for example receiver (1506,1508), (1536,1538), (1563,1564) of the typical receiver shown in the equipment 7 1562 of the equipment 6 1532 of equipment 5 1502, Figure 15 of Figure 15 or Figure 16.According to the present invention, receiver 1902,1904 should receive the composite signal that comprises a routine or a basis signal and a blinker, and retrieval is corresponding to the original information sets of launching information sets in advance.Each transmitter 1910,1912 can comprise the encoder 1922,1924 of a coding signaling before emission.Transmitter 1910,1912 can be any one or its variation, for example transmitter (1304 and 1310), (1404), (1412) of the exemplary transmitter shown in the equipment 4 1410 of the equipment 3 of the equipment 1 1302 of Figure 13 and equipment 2 1308, Figure 14 or Figure 14.According to the present invention, transmitter 1910,1912 should be launched one or more following: routine or basis signal, blinker and/or composite signal.

Memory 1930 comprises routine 1932 and data/information 1934.Processor 1926 is by the routine in the execute store 1,930 1932 and use the operation of the data/information 1934 control terminal nodes 1900 in the memory 1930, with

operation receiver

1902,1904 and

transmitter

1910,1912, carry out the basic Radio Terminal Function of processing controls, and control and implement new feature of the present invention and improvement, comprise generating and the emission composite signal, receiving composite signal, composite signal is categorized as routine or basis signal information and blinker information, classification and recovering information.

Routine 1932 comprises communication routines 1936 and wireless terminal control routine 1938.Wireless terminal control routine 1938 comprises a transmitter control module 1940, receiver control module 1942, a correction module 1946.Data/information 1934 comprises MTU information 1958, partial information 1960, quality information 1962 and the base station IDs information 1964 of user data 1947, terminal identifier (ID) information 1948, the information 1 1950 that receives, the information N 1952 that receives, emission information 1 1954, emission information N 1956, identification.

User data 1947 comprise will to the data of base station 1800 emission and from the base station 1800 data that receive, and intermediate data, for example data that in the decoding processing of the information of recovering to detect, relate to.Emission information 1 1954 can comprise one group can be corresponding to one first signal, for example, the information of routine or basis signal, definition can be used for launching the information of transmission block of the MTU of described first signal, definition will be used to define the information of first group of MTU of described signal, to modulate on described first group of MTU to define the information of described first signal, definition should be to for example information that launch corresponding to which MTU of first signal message base station 1800.In certain embodiments, will launch each to base station 1800 and transmit the MTU of first group of information data.In other embodiments, should be to the most of MTU that transmits first group of information of base station 1800 emissions.Emission information N 1956 can comprise one group can be corresponding to a secondary signal, for example, the information of blinker, definition for example can be used for the information to the transmission block of the MTU of a described secondary signal of base station, definition will be used to define the information of second group of MTU of described secondary signal, should modulate to define the information of described secondary signal on described second group of MTU.The information 1 1950 that receives comprises first group of information of recovering from receiver 1 1902, for example corresponding to the information of launching information in advance of first group of base station.First group of information of recovering can, for example, from routine or basis signal, recover.The information N 1952 that receives comprises second group of information of recovering from receiver N1904, for example corresponding to the information of launching information in advance of second group of base station.Second group of information of recovering can, for example, from blinker, recover.

Define the more shared public MTU of each original routine of launching information sets in advance and blinker.The MTU information 1958 of identification can comprise one group second or blinker in the MTU that discerns, can obtain the MTU group of described identification by the decoder 1920 of receiver N.The MTU information 1958 of identification can be transmitted to receiver 1 1902, wherein this receiver 1902 can be got rid of those MTU before the signal that the correction module transmission in decoder 1918 receives, or as an alternative, the MTU information 1958 of identification can be transmitted to correction module 1946 in the memory and/or the correction module in the decoder 1918.

Termination ID information 1948 is ID of a base station assigns.Base station IDs information 1964 comprises the information that can be used for the certain base station that identified wireless terminal 1900 connected, for example tilting value.Use base station IDs information 1964 and Termination ID 1948, wireless terminal can specified data and is controlled frequency hop sequences.Quality information 1962 can comprise coming for example current emission rank and battery energy level, the SNR etc. of information, downlink channel quality and report, interference level, power information of self-monitoring pilot tone.According to the present invention, quality information 1962 can be fed back to base station 1800 being used for receiver being categorized as " stronger " or " more weak " receiver, arrange and distribute to help base station 1800, comprise and distribute routine or foundation and high speed part.Partial information 1960 can comprise according to type of service, for example Traffic Channel, allocated channel, request channel; Characteristic, for example MTU, frequency/phase and time, OFDM key signature; The signal type that is used for part, for example conventional or basic with respect to blinker, define the information of the part of distributing to the user.

Communication routines 1936 comprises and can be used for providing special service to one or more terminal node users, for example, and the various communications applications of IP phone service, text service and/or interactive game.

Wireless terminal control routine 1938 is being controlled the basic function of wireless terminal 1900, comprises the operation of

transmitter

1910,1912 and

receiver

1902,1904, the signal generation that comprises data/control frequency hop sequences and reception, State Control and power control.Wireless terminal control routine 1938 is also controlled and is implemented new feature of the present invention and improvement, comprises generation and emission composite signal, receives composite signal, composite signal is categorized as routine or basis signal information and blinker information, classification and recovering information.

According to the present invention, transmitter control module 1940 can be used the data/information 1934 that comprises emission information 11954, emission information N 1956, Termination ID 1948, user data 1947 and partial information 1960, generates to transmit and

control transmitter

1910,1912 operation.For example, transmitter control module 1940 can control transmitter 1910, via its encoder 1922, and the routine or the basis signal that become transmitter 11910 to launch the block coding that is included in the emission information 1 1954.Transmitter control module 1940 can control transmitter N 1912, via its encoder 1924, uses the MTU group corresponding to the information among the emission information N 1956, and the block coding in the information of being included in 1956 is become to flash or shielded signal.As an alternative, in the various embodiment of

transmitter

1910,1912, can use individual transmitter, it is combination or mixed signal under the guidance of transmitter control module 1844 in internal condition emission information 1 1954 and emission information N 1956.This married operation can be included in before the emission, stack routine and blinker, and/or form a MTU emission group that comprises each blinker unit and be not included in the unit in the normal signal within the blinker selectively.

According to the present invention, the operation of receiver control module 1942

receiver control

1902,1904, to receive composite signal and to extract two groups of information, for example receiver information 1 1950 and receiver information N 1952.Reception under 1942 controls of receiver control module is handled and can be comprised

control decoder

1918,1920, and other unit within the receiver control.In certain embodiments, receiver control module 1942 is with

receiver

1902,1904 control impuls noise filterings, background noise filtering and error detection module.In certain embodiments, receiver control module 1942 is being controlled at a receiver, for example, secondary signal MTU identifier module among the receiver N 1904, and at another receiver, for example, the discard module in the receiver 1 1902, and from the MTU information 1958 of receiver N 1904 to receiver 1 1902 transmission identifications; This allows receiver 1 1902 to remove the MTU that comprises blinker information from the information flow that enters the correction module of attempting to recover the normal signal information sets.

Correction module 1946 associating or substitute one and can be included in the correction module in the

receiver

1902,1904 and work.The error detection and the error correcting capability that are included in

receiver

1902,1904 and/or the module 1946 allow wireless terminal 1900 to reproduce corresponding to the information sets of launching information sets in advance, signal has been subjected to the stack of second blinker (blinker) or the punch-through that is produced by secondary signal (blinker) even information sets (conventional or basis) is launched in expression in advance, for example, replace the influence of some MTU.

On-off keying is a kind of transmitter is concentrated its energy along the subclass of the degree of freedom that is taken by code word a modulation technique.For example, pulse position modulation is an example of on-off keying, and wherein transmitter only uses energy on the position of those transmission " 1 ", and cuts off when transmitting " 0 ".By concentrate energy in one of M position, pulse position modulation can be transmitted the individual bit of log2 (M).By using positive negative pulse stuffing, can transmit extra bit.The example of pulse position modulation as shown in Figure 3.Fig. 3 represents that has 32 cracks, for example, and the diagram 300 in typical independent crack 302.Concentration of energy is on the 17th crack 306, and by pulse 304 expression.In Fig. 3, if pulse 304 is positioned at for example positive direction of a direction only, then use 32 positions or crack, can transmit the information of 5 bits.In Fig. 3,, can transmit the information of 6 bits if pulse 304 can then be used 32 positions or crack for just or negative.In general, under the common situation of on-off keying, can come transmission information with two kinds of methods---the first, the position of the energy within the degree of freedom that takies by code word, the second, be included in the information in the signal that takies this position.For example, if mobile phone can be estimated channel by means of a reference signal, then except information encoded on the position of the energy of general switching signal, can be in phase place and/or amplitude coded message.In the remaining part of this document, the form of described general on-off keying will be called as flashes signaling.Usually, in flashing the example of signaling, energy concentration is limited to a little subclass of the available degree of freedom.

According to the present invention, can use and flash signaling.With what describe is the simple case of flashing coding according to of the present invention.Consider an embodiment who is applied to use the digital communication system of BPSK signaling of the present invention.In the example of Kao Lving, suppose that air link resources comprises 16 symbols here.For example, in typical spread spectrum OFDM multiaccess system, 16 air link resources symbols can be the tones of 16 quadratures in an OFDM symbol period, an or tone in 16 OFDM symbol periods, the perhaps any suitable tone and the combination (for example, 4 tones in 4 OFDM symbol periods) of symbol period.

In Fig. 4, the signal 400 of stack comprises a normal signal 420 that uses energy to transmit across the code word of all 16 BPSK symbols, as among Fig. 4 by shown in the shadeless little rectangle.Can use, for example convolution code is constructed conventional code word.Suppose that shielded signal is required to transmit 5 information bits.In the present embodiment, can use as among Fig. 4 by single hypographous position than the high-energy symbol 430 shown in the large rectangle, transmit 5 shielded bits.Shielded signal comprises a BPSK symbol 430 with high power transmission, simultaneously with normal signal 420 stacks of Energy distribution on 16 symbols thereon.Notice that the BPSK symbol of shielded signal can be arranged in any one of 16 distinct symbols positions.As with reference to ground, in Fig. 4, discern first symbol 401 and the 16th symbol 416.For example, in Fig. 4, emission BPSK symbol on the 9th symbol.Therefore, this character position transmits 4 bits in 5 shielded information bits.In addition, the phase place of BPSK symbol (for example, sign) is transmitted the 5th shielded bit.

In order to see that described encoding scheme of the present invention surpasses the advantage of traditional superimposed coding scheme, rethinks the design of stronger receiver.Stronger receiver can use the notion of decoding in succession.The stronger receiver shielded signal of at first decoding is removed it then from the composite signal that receives, the normal signal of decoding at last, signals to more weak signal receiver, to abandon the tone that detects on it than large-signal perhaps as an alternative.Note to use new encoding scheme of the present invention,, but the damage of conventional code word is limited to one or several symbol, so receiver can minimize the adverse effect of this breaking-up even eliminate unsatisfactoryly.For example, in decode procedure, receiver can be ignored the symbol that is taken by normal signal.In the case, the elimination operation is reduced to and causes in the locational elimination of special symbol, and might use error correcting code to proofread and correct loss.

In the example of above-mentioned Fig. 4, each BPSK symbolic representation one degree of freedom of 16 air link resources symbols.Normal signal distributes its energy on 16 all degrees of freedom.Simultaneously, each code word of shielded signal is concentrated its energy on one of 16 degrees of freedom.Attention as above-mentioned embodiment are defined, and blinker is an orthogonal code.Yet the present invention is not decided by any orthogonal property of code word.

With what describe is according to the transmitter design for the coding use of the invention process.Above-mentioned example has been represented feature of the present invention and method, and it can be implemented in various communication systems and utilize.This by concentrating the energy of shielded signal to come superposed signal between a smaller subset of the available degree of freedom, the method for the energy of distribution normal signal between all basically available degrees of freedom is called as in this document and flashes supercomposed coding simultaneously.In this discussion, shielded code word is expressed as " blinker ", and conventional code word is expressed as " normal signal " or " basis signal ".Although in general, this method uses blinker to launch shielded information, and uses normal signal emission routine information, and in some embodiments of the invention, this can be opposite.

According to the present invention, flashing signaling provides a kind of permission to obtain the method for the superposed signal of supercomposed coding gain well in the receiver of reality.In general, use identical transmission resources group to transmit blinker and normal signal.Yet each code word of blinker is concentrated its energy on the little subclass of the available degree of freedom.Each code word of normal signal can be expanded its energy on each available degree of freedom.In order easily to detect and decode blinker, wish that its energy is higher, this energy is higher than significantly at the energy of concentrating normal signal corresponding to the chooser of the degree of freedom of blinker in certain embodiments.Even when the gross energy of normal signal is higher than the gross energy of blinker, this higher relatively concentration of energy also is feasible in the high speed subclass of selecting.At last, in order easily to detect and decode normal signal, blinker should be minimum to the influence of conventional code word.In other words, the energy loss concentrated of the chooser of the degree of freedom that is taken by blinker should have little influence to the conventional code word of decoding.

The selection of the transmitting power of blinker and normal signal is according to some factors, comprises that (a) at a high speed and the two the SNR of target receiver of normal signal; (b) information rate of high speed and normal signal transmission; And (c) at a high speed and the building method of the code of normal signal.In general, can select robustness and the coding efficiency requirement of power independently to satisfy them.And, can carry out in opportunistic mode and flash signaling to obtain maximum flexibility.Especially, transmitter can be selected not launch blinker in opportunism ground, and uses the major part of its available horsepower to launch normal signal.As an alternative, transmitter can select to use the major part of its available horsepower to come opportunism ground emission blinker, and selects not launch normal signal.

To discuss now according to the receiver that uses for coding of the invention process and design.In one embodiment of the invention, the receiver blinker of at first decoding.This blinker is detectable at the receiver place, because it is to receive to compare much higher power with the conventional code word in the smaller subset of the degree of freedom.Then, receiver was eliminated the influence of blinker before the conventional code word of attempting to decode.Under the situation of traditional supercomposed coding, elimination comprises the shielded code word of decoding and it is removed from the composite signal that receives.In flashing supercomposed coding, in one embodiment, when receiver will be decoded normal signal, receiver was discarded in the signal that receives in the subclass of the degree of freedom of blinker code word of decoding fully.Because normal signal distributes it in all degrees of freedom signal energy, in view of the error detection and the error correcting capability of decoder, the erasure signal energy will have seldom or insignificant performance impact to the conventional code word of decoding in the little subclass of the degree of freedom.

In another embodiment of the present invention, receiver and was eliminated blinker ambiguously before the decoding normal signal.As an alternative, the receiver normal signal of directly from the composite signal that may comprise blinker that receives, decoding.Receiver uses soft criterion to add saturated and the counter-rotating restriction.Therefore, blinker is used for saturated or eliminates the signal component of the subclass of its shared degree of freedom basically, but the performance of the conventional code word of decoding is had insignificant influence.And, if receiver is not interested in the blinker, receiver can only be decoded normal signal and the blinker that need not to decode, receiver even can recognize the existence of blinker in the case, and can and/or think pulse or background noise with its explanation.

The embodiment of control channel of the present invention will be discussed below.In this section, description is applied to the embodiment of the invention of the control channel of canonical system.In this example, in cellular wireless system 1700 as shown in figure 17, control channel from the base station 1702 by downlink broadcast channel to a plurality of mobile subscriber's 1708,1710 transmission information.In most of cellular wireless systems, control channel is launched with broadcasting power, because they receive the mobile subscriber's of weak channel constraint.In the case, blinker sends and to be very suitable for this application, and causes significant power reduction and do not have or the loss of robustness seldom.

Suppose and loaded information on control channel can be divided into a plurality of subclass, each subclass refers to the one or more subclass of the mobile subscriber in the system.In this example, our supposition can be divided into control channel information two subclass.First subclass is expressed as " routine information ", and be intended to use for the medium mobile subscriber to higher down link SNR of those impressions.Be expressed as second subclass of " shielded information ", be intended to use for user's subclass of the low-down down link SNR of impression.

In the example of Kao Lving, suppose that air link resources comprises 32 symbols here.For example, in typical spread spectrum OFDM multiaccess system, air link resources can be the tone of 32 quadratures in an OFDM symbol period, an or tone in 32 OFDM symbol periods, the perhaps any suitable tone and the combination (for example, 4 tones in 8 OFDM symbol periods) of symbol period.

As shown in the superposed signal 500 of Fig. 5, use the code word of 32 symbols to launch the routine information of representing by shadeless little rectangle in this example 540.As with reference to ground, express first character position 501 and the 32nd character position 532.Described code word is launched with the power of user's subclass decoding of being enough to be experienced medium or higher SNR.The user of the low SNR described code word of may not decoding, this power requirement must be compared much lower by the situation of each mobile subscriber's decoding with described code word thus.Can experience in the wireless environment of the SNR that changes several magnitude the mobile subscriber, this difference in the ability of decoding code word is correct especially.Use as shown in Figure 5, by the blinker 550 that 4 hypographous large rectangles are represented, launch the shielded information of planning for low SNR mobile subscriber's subclass use.In the present embodiment, suppose that each shielded code word concentrates its energy on 4 character positions 502,512,520,530.Suppose that in this example 4 character positions of this group are non-overlapping, this produces the group of 8 quadratures, and every group comprises 4 character positions.Yet in other structure, codeword groups can be overlapping partially or completely in general.From multifarious viewpoint is provided cellular wireless system, it is important concentrating the energy of shielded code word on more than a character position, and the higher degree of protection that bears channel fading and interference is provided.

In the example of Fig. 5, each shielded subset of codewords only by its position, is transmitted 3 bits.Making k is the index of 8 different air link resources symbols.Suppose that from 0 to 31 comes 32 air link resources symbols of index.For k=0 ..., 7 o'clock, air link resources symbol is-symbol k, k+8, k+16 and the k+24 of k glossary of symbols position.

When the blinker code word comprises a plurality of symbol, can use those symbols to transmit extra information bit.Make that { q0, q1, q2, q3} represent to use four symbols that four the air link resources symbols of any one are launched in eight air link resources symbols.In one embodiment, can use as 4 listed length of table 1 is that 4 Walsh code is constructed { q0, q1, q2, q3}.The selection of q0, q1, q2 or q3 produces 2 the extra bits that transmit by the selection of 4 code words.

Described information can be decoded at the mobile receiver place in simple mode.Because can be used for discerning the higher-energy of blinker of the glossary of symbols position of 3 bits, mobile receiver can be discerned the position of blinker.Then, it extracts and comprises the symbol of blinker and decode remaining 2 bits.Described code word example of structure produces the code word with non-homogeneous error protection character and handles.Bit by the position resolution of blinker receives with high reliability.When transmitting blinker by wireless channel, this is especially accurately, because have only needs to be received with appointment codes word subclass in four character positions.The detection of q0, q1, q2 or q3 is to from the error code of channel fading or interference susceptible to more.As an alternative, receiver can adopt more complex decoding device, maximum likelihood decoder for example, the full content of the blinker of decoding.Equally, the present invention is not decided by the use of the orthogonal code on blinker as shown in this example.

This notion can be generalized to polynary modulation group in simple mode equally.For example, if will use BPSK modulation, the phase place (being sign) that can use blinker code word pilosity is again sent a bit.And, if will use the QPSK modulation, can use the selection of homophase or quadrature signaling, send an extra bit.

The structure of the orthogonal code of table 1 on blinker

The code word index	{ the bit value of q0, q1, q2, q3}
The code word index	{ the bit value of q0, q1, q2, q3}	0	{+，+，+，+}
1	{+，+，-，-}	0	{+，+，+，+}
1	{+，+，-，-}	2	{+，-，+，-}
3	{+，-，-，+}	2	{+，-，+，-}

To describe now according to the signaling of flashing in the multi-access channels of the present invention.Although up to the present described the present invention in the broadcast channel example, it is equally applicable in the structure of multi-access channels.To under environment, described feature of the present invention be described now as the cellular uplink of the canonical system of multi-access channels.Consider a base station receiver on up link from two mobile transmitter received signals.Because base station 1702 still is a coordination entity, it can distinguish two transmitters with relative induction.Suppose that the mobile transmitter of working is designated as " stronger " transmitter on the channel that low path loss is arranged, and another transmitter of experiencing higher path loss is considered to " more weak " transmitter.The base station more weak transmitter of indication is launched its signal to cross over each degree of freedom distributing signal energy, and stronger transmitter is indicated on the emitted energy of concentrating it in several degrees of freedom.At the composite signal 600 of the reception of base station receiver 1802 as shown in Figure 6.That base station receiver 1802 is represented by shadeless little rectangle in decoding, before the weak signal 620 of " more weak " transmitter emission, can decode easily and eliminate represent by hypographous large rectangle, from the blinker 610 of " stronger " transmitter emission.

Mobile transmitter being categorized as " stronger " or " more weak ", is not static, but relative defining, with the flexibility within the permission system.Be alternative in or the path loss except experiencing on uplink channel, " stronger " of mobile transmitter or " more weak " notion can be relevant with other standard.In certain embodiments described carries out mark or classification to " stronger " or " more weak " mobile transmitter, can be applied in the environment of the interference cost in the cellular uplink.For example, the mobile transmitter that produces high uplink channel interference in other unit can be thought " more weak " transmitter, and therefore can launch its signal by the base station indication by crossing over each degree of freedom distribute energy.And on the other hand, the mobile transmitter that low interference cost is arranged that causes owing to the position can be thought " stronger " transmitter, and can use and flash supercomposed coding with its signal of stack on the signal of " more weak " transmitter.As an alternative, in certain embodiments, can mobile transmitter be categorized as " stronger " or " more weak " according to the facility constraints for example power of battery or state.

With what describe is according to the signaling of flashing in the canonical system of method and apparatus of the present invention.In a typical wireless data communication system, air link resources generally includes bandwidth, time and power.The air link resources that transmits data and/or speech business is called as Traffic Channel.In exemplary systems, data are transmitted by the Traffic Channel in the Traffic Channel part (abbreviating service part as).Service part can be used as the basic or minimum unit of available traffic channel resource.Downlink traffic part from the base station to the wireless terminal data services, and the uplink service part from wireless terminal to the base station data services.In exemplary systems, service part is included in the many periodicity pitches in the limited time interval.

Be used for explaining canonical system of the present invention, and base station 1702 wireless terminal in communication 1708,1710 between shared service part dynamically.Arrange scheduling feature, for example the module 1838 in the base station 1800 to one of portable terminal 1708,1710, is distributed each up link and downlink portion according to many standards.Can be from a part to another part to different user's distribution service parts.For example, in Fig. 7, in the figure 700 of frequency on the longitudinal axis 702 with respect to the time on the transverse axis 704, base station scheduler will be distributed to user #1 with the part A 706 of vertical line shadow representation, will distribute to user #2 with the part B 708 of horizontal line shadow representation.Base station scheduler can be according to the service needed and the channel status of the time dependent different user of general possibility, apace to they distribution service channel strips.Like this, based on part one by one, between different users, shared effectively and distribution service channel dynamically.In exemplary systems, the assignment information of transport service channel strip in comprising the allocated channel of a series of distribution portion.For example in the system shown in Figure 17 1700, in down link, launch distribution portion at cellular wireless system usually.Be useful on the distribution portion of downlink traffic part, and the distribution portion of uplink service part independently.Each service part is relevant with unique distribution portion.The assignment information of relevant distribution portion business transferring part.Assignment information can comprise the identifier of the user terminal that is assigned to use described service part and coding and the modulation scheme that is used for described service part.Fig. 8 comprises a figure 800 that the transverse axis 804 of the expression longitudinal axis 802 of frequency and express time is arranged.Fig. 8 represents two distribution portion, distribution portion A ' (AS A ') 806 and distribution portion B ' (AS B ') 808, the assignment information of their business transferring part A (TS A) 810 and B (TS B) 812.Allocated channel is shared channel resource.The user, for example wireless terminal is received in the assignment information of transmitting in the allocated channel, uses the Traffic Channel part according to assignment information then.

Decode by the data of base station 1702 emission on the downlink traffic part by the receiver in predetermined wireless terminal 1708,1710, and the data of decoding and launching on uplink portion by the wireless terminal 1708,1710 that distributes by the receiver in the base station 1702.Usually, the part of emission comprises redundant bit, determines whether correctly to have decoded data to help receiver.This will do, because wireless channel may be unreliable, and useful data service has the integrality requirement of height usually.

Because interference, noise and/or channel fading in the wireless system, the emission of service part may success or failure.In canonical system, the receiver of service part sends an affirmation, whether has correctly received this part with expression.Comprising a series of affirmation information of confirming to transmit in the affirmation channel partly corresponding to the Traffic Channel part.Each service part and unique affirmation part correlation.For the downlink traffic part, confirm that part is arranged in up link.For the uplink service part, confirm that part is arranged in down link.Confirm partly to transmit at least the information of a bit, for example whether a bit has correctly received relevant service part with expression.Because the predetermined association between uplink service part and confirmation unit branch may need not to transmit out of Memory in confirming part, for example user identifier or partial index.Confirm part normally by the user terminal that uses the related service part, for example wireless terminal 1708,1710, but not other user terminal use.Like this, in two kinds of links (up link and down link), acknowledgement channel is a resources shared, because it can be used by a plurality of users.Yet the contention that does not cause by using shared affirmation channel does not have ambiguity because at which user terminal will use in the specific affirmation part usually usually.Fig. 9 represents the figure 900 of downlink traffic part, and it comprises that the transverse axis 904 of the longitudinal axis 902 of an expression frequency, an express time, first service part are service part (TS) A 906 and one second service part TS B 908.Fig. 9 has also represented the second graph 950 of uplink acknowledgment (ACK) part, and it comprises the longitudinal axis 952 of an expression frequency and the transverse axis 954 of an express time.Fig. 9 has further represented two uplink acknowledgment parts, A ＂ 956 and B ＂ 958, and it transmits the affirmation information of downlink traffic part A 906 and B 908 to base station 1702 from wireless terminal 1708.

As mentioned above, canonical system 1700 can be one by base station 1702 packet-switched cellular radio data system of distribution service part dynamically on down link and up link.The present invention that will describe canonical system 1700 now in the environment of cellular downlink uses.Suppose that base station 1702 can distribute at most to two service parts in the mode of time slot at every turn.These parts of broadcasting will be planned the selection for which user use on allocated channel.Further with being without loss of generality among two users of supposition to compare the SNR running low with another user.About this point, two users are considered to mutual " stronger " and " more weak ".

Frequency on the diagrammatic representation longitudinal axis 1002 of Figure 10 is with respect to the time on the transverse axis 1004.Figure 10 comprises that also 1006, A Traffic Channel part (TCHa) 1008, A of an A (routine) distribution portion (ASGr) (at a high speed) confirm that 1007 and B of 1005, B Traffic Channel parts of part (ACKf) 1010, B high speeds distribution portion (ASGf) (TCHb) confirm part (ACKr) 1009.ASGf 1005 is within the spectral range of ASGr 1006.ACKf 1010 is within the spectral range of ACKr 1009.

As shown in figure 10, on allocated channel, use the normal signal emission to be used for stronger user (ASGr) 1006 assignment information, and use blinker to transmit the information (ASGf) 1005 that is used for more weak user.Stronger receiver learns that it will receive a service part that is expressed as TCHa 1008 from its (routine) distributes, and similarly, its the corresponding service part of distributing (ASGf) 1005, more weak receiver to be apprised of to be expressed as TCHb 1007 by blinker.In exemplary systems, mobile receiver 1708,1710 provides a feedback acknowledgment to base station 1702 on up link, the state of the service part that receives with expression.

As shown in figure 10, these two mobile subscribers 1708,1710 can use superpose their affirmation signal of blinker.For this purpose, will be assumed to the stronger transmitter on up link, and use blinker (ACKf) 1010 to transmit its affirmation thus at " stronger " receiver on the down link.More weak receiver distributes the energy of its affirmation signal on each degree of freedom, and it is transmitted to base station 1702 as normal signal (ACKr) 1009.

At flashing signaling, the capacity impact of cellular wireless system is discussed now.The constraint that cellular wireless system is disturbed usually, and their capacity depends on environmental interference amount and characteristic thereof.Signaling is flashed in use has very important influence to interference level.In the middle of all identical noise signals of energy, Gaussian noise produces minimum capacity, and this is well-known information theory result.Blinker is because their structure is that the peak and non-to heavens in essence Gauss are arranged.Therefore, given identical interference total amount, when unit in the wireless system uses blinker, these signals to the influence (as disturbing) of other unit if be less than this situation of signal of image height of using.This is applicable to the up link and the downlink path of cellular wireless system.

Figure 11 represents two typical information groups, first information group 1150 and second information sets 1160 that can use a transmission block to launch according to of the present invention.First information group 1150 comprises information A ₁1151, information A ₂1152, information A _N1153; Second information sets 1160 comprises information B ₁1161, information B ₂1162, information B _M1163.First information group can be for example user data, distribution or affirmation.Second information sets can be for example user data, affirmation or distribution.Figure 11 also represents the figure 1100 of minimum transmission units (MTU), and wherein the longitudinal axis is represented periodicity pitch, transverse axis 1104 express times.In Figure 11, each little square frame refers to a specific MTU unit, zone 1112 for example, and expression can be used for launching 1 degree of freedom of information.Each crack on the transverse axis, for example the crack 1110, the time of expression emission MTU, for example OFDM symbol time.Each square among Figure 11, for example typical case's square 1114, represent a MTU unit.Each MTU launches the combination of resources of information corresponding to unique being used to, and described combination of resources comprises at least two in time, frequency, phase place and the spreading codes.In ofdm system, MTU can be frequency or phase place in time, for example homophase in the OFDM key signature or quadrature component.In cdma system, the MTU unit can be for example to distribute to the spreading codes of time quantum.Typical transmission piece 1106 shown in Figure 11 is groups of 20 MTU.Definition is used for the information of first information group 1150 on first group of minimum transmission units.First group of minimum transmission units is to have the square of the diagonal 1116 that rises from left to right to discern by those.Typical first group of MTU comprises 15 MTU, and for example, typical MTU 1120 is in first group of MTU.According to the present invention, first group of MTU comprises the most of at least MTU in the transmission block 1106.In certain embodiments, first group of MTU comprises the MTU of at least 75% in the transmission block 1106.The example of Figure 11 is the such embodiment of MTU sum=75% that comprises 15 first group of MTU/20 square frames 1106.Definition is used for the information of second group of information 1160 on second group of minimum transmission units.Second group of minimum transmission units is to have the square of the diagonal 1118 that descends from left to right to discern by those.Typical second group of minimum transmission units comprises 3 MTU.According to the present invention, second group of MTU comprises the MTU that compares with first group of MTU still less, and some MTU among first and second groups of MTU are identical.For example, in Figure 11,2 MTU, MTU 1122 and MTU 1123 are included in two groups.In certain embodiments, second group of MTU is less than half of MTU quantity of first group of MTU; Figure 11 is the example of this embodiment.Can be for example, 1702 to wireless terminal 1708,1710 from the base station, uses and is included in first and second groups of minimum transmission units in the minimum transmission units, is delivered in the information in first and second information sets 1150,1160.

Figure 12 represents that minimum transmission units (MTU) on the longitudinal axis 1202 is with respect to the figure 1200 of the time on the transverse axis 1204.Figure 12 represents a typical transmission piece 1205 that comprises 1600 MTU.First information group can be represented by the most first group of MTU that comprises 1600 MTU in the transmission block 1205.According to the present invention, transmission block 1205 can be subdivided into sub-piece.In Figure 12, the transmission block 1205 of MTU is divided into the sub-piece of 16 MTU, and each subclass comprises 100 MTU.Each little square, for example typical square 1206 comprises the sub-piece of a MTU.In certain embodiments, first group of MTU can be subdivided into little information sets, represented by first group of MTU within the independently sub-piece for every group.In combination, described little information sets is illustrated in first group of information of encoding on the major part of big transmission block 1205.100 typical MTU of a sub-piece of typical case of sub-piece 1207 expressions of typical case.100 typical MTU of sub-piece 1208 another the sub-pieces of expression of typical case.Each MTU of other sub-piece of transmission block 1205 that do not draw, but can suppose that each other sub-piece is similar to typical sub-piece 1207.MTU of each circle expression in sub-piece.Every the diagonal that rises from left to right and run through a circle is represented an independent MTU who is used for representing the information of first information group.Every the diagonal that descends from left to right and run through a circle is represented an independent MTU who is used for representing the information of second information sets.In Figure 12, typical MTU 1208 is used to one of MTU that represents first information group; Typical MTU 1211 is another MTU that are used to represent first information group.Under specific circumstances, typical MTU 1209 also is not used in the information of representing in first or second information sets, although it is within the scope of typical transmission block 1205.That is to say, shown in particular point in time, MTU 1209 also is not used in the signal of transmission corresponding to first or second information sets.Typical MTU 1210 is used for representing the information of while in the first information group and second information sets.

In the example of Figure 12, each sub-piece, for example sub-piece 1207, definition, the part of first information group uniquely information on the boy's piece that can be used for representing to represent uniquely at MTU.Yet second information sets can be represented different information sets, for example the information of 10 bits.In order to transmit the information of 10 bits uniquely, may need 2 ¹⁰=1024 possible minimum transmission units.Can use the transmission block 1205 of 1600 available possible minimum transmission units, and divide the particular value that is equipped with expression 10 bit informations to single MTU.In this example, when emission information, MTU 1210 is MTU that the information of second information sets is transmitted in unique being used to.Figure 12 has represented that each is included in second group of MTU among the MTU and also is included in first group of situation among the MTU simultaneously.

Figure 13 1301 expressions are a kind of according to the present invention, are used to launch two information sets, for example, and the information sets 1150 of Figure 11 and 1160 method.Figure 13 comprises one first equipment, the equipment 1 1302 that for example to contain a transmitter be transmitter 1 1304, and one second equipment, the equipment 2 1308 that for example to contain a transmitter be transmitter 2 1310.Each equipment can be, for example the base station of type shown in Figure 17 or wireless terminal.By the signal from transmitter 1 1304 emissions, for example signal 1 1306, transmits first information group 1150.Signal 1 1306 is called as basis or normal signal sometimes.By the signal from transmitter 2 1310 emissions, for example signal 2 1312, transmit second information sets 1160.Signal 2 is called as blinker sometimes.At Figure 13 in typical case, signal 1 1306 will use first group of minimum transmission units, and signal 2 1312 will use second group of minimum transmission units.Will be identical by among first group of MTU of transmitter 1 1304 emission some with among second group of MTU some, this causes some stacks of signal 1 1306 and signal 21312.

Figure 14 represents two kinds according to the present invention, is used to launch two information sets, for example, and the information sets 1150 of Figure 11 and 1160 method.In the first method of in Figure 14, describing, a kind of typical equipment 3 1402, for example base station or wireless terminal comprise the transmitter that can launch the signal that corresponds respectively to first and second information sets 1150,1160 simultaneously, promptly transmitter 31404.In Figure 14, signal 3 1406 is corresponding to first information group 1150 and use first group of MTU, and signal 4 1408 is corresponding to second information sets 1160 and use second group of MTU.Signal 3 1406 is called as basis signal or normal signal sometimes, and signal 4 1408 is called as blinker sometimes.Based on each minimum transmission units, transmit 4 1408 to compare higher power level with signal 3 1406.In certain embodiments, transmit 4 1408 power level at least than the power level big 3db of emission corresponding to the minimum transmission units of signal 3 1406.In certain embodiments, can change the transmit power level of 3 1406 the minimum transmission units of being used to transmit.Can also change the transmit power level of 4 1408 the MTU of being used to transmit.

In the second method of describing in Figure 14, a kind of typical equipment is equipment 4 1410, and for example base station or wireless terminal comprise that a transmitter is a transmitter 4 1412.Transmitter 4 1412 comprises one first signaling module 1411 and a secondary signal module 1413.The signal 5 1414 that first signaling module 1411 generates corresponding to first information group 1150.The signal 6 1416 that secondary signal module 1413 generates corresponding to second information sets 1160.Before the MTU that transmits in 1420, by combiner modules 1418 composite signals 5 1414 and signal 6 1416.Signal 5 1414 is called as basis or normal signal sometimes, and signal 6 1416 is called as blinker sometimes.Combiner modules 1418 can be carried out two signals, i.e. the stack of signal 5 1414 and signal 6 1416.As an alternative, combiner modules 1418 can be relatively be used to transmit 51414 MTU group with will be used to transmit 6 1416 MTU group.Combiner modules 1418 can be advanced the information guide in the signal 6 1416 each requested MTU; Yet module 1418 can exclude those MTU that are assigned to transmit signal 6 1416 the MTU group of distributing to signal 5 1414.For example, in the example of Figure 11, can make MTU 1122 and MTU 1123 refusals transmit the information of signal 5 1414.Like this, second information sets, 1160 punctures in the signal 6 1416 or the first information group 1150 in alternative (will take identical MTU's) signal 5 1414.This execution mode supposition receiver has error detection and the error correcting capability that is enough to recover the original first information group 1150 that some information is not launched.Like this, replace to use actual stack, can launch signal, before actual transmission, abandoning first group of overlapping signal, and need not it is superimposed upon on first group the signal corresponding to second group.In this case, the MTU that is used for transmitting second information sets punctures the MTU group that is selected to launch first information group at shared transmission block.

Figure 15 represents a kind of typical equipment, and promptly equipment 5 1502, for example base station or wireless terminal, and according to the present invention, it can be used for the information that receives composite signal and obtain two group of received, i.e. information A ' 1516 and information B ' 1518.Information A ' 1516th is corresponding to the information sets of the recovery of first group of original emission information in advance (being the information A 1150 of Figure 11).Information B ' the 1518th, corresponding to the information sets of the recovery of first group of original emission information in advance (being the information B 1160 of Figure 11).Equipment 5 1502 comprises first receiver that contains an impulsive noise filtering 1510 and a correction module 1512, and promptly receiver 1 1506.Contain the signal of launching together with the passing of time, for example, the composite signal of the signal 4 1408 (blinker) of the signal 3 1406 of Figure 13 (routine or basis signal) and Figure 13, it is signal 8 1520, handled by receiver 1 1506, wherein impulsive noise filtering 1510 filtrations or refusal are corresponding to the signal of the MTU unit that derives from second information sets 1160.Handle by correction module 1512 corresponding to the pairing residual signal of most of MTU (normal signal) in the MTU group of first information group 1150, it recovers " information of losing ", thus the information sets A ' the 1516th that receives, the good reproduction of launching information sets A 1150 in advance.Equipment 5 1502 also comprises second receiver that contains a background noise filtering 1514, and promptly receiver 2 1508.Composite signal 8 1520 also enters receiver 2 1508, wherein background noise filtering 1514 will be corresponding to first information group 1150, for example, the signal of signal 3 1406 is considered as noise, and remove or refuse this low level signal, stay signal (for example blinker), the good reproduction of the second information sets B 1160 of emission in advance can be reproduced the information sets B ' 1518 into receiving thus.

Similar to equipment 5 1502, second equipment as shown in figure 15 is that equipment 6 is carried out the composite signal reception and information is recovered.Equipment 6 1532 comprises that one first receiver is that receiver 11536 and one second receiver are receiver 2 1538.Receiver 1 1536 comprises a decoder that contains a pulse bandwidth filtering 1544 and correction module 1546, and promptly decoder 1 1540.Receiver 2 1538 comprises a decoder that contains a background noise filtering 1548, and promptly decoder 2 1542.The operation of equipment 6 1532 is to described similar about equipment 5 1502, except carry out extra decoding in equipment 6 1532.During operation, receiver 1536 and 1538 independent and runnings concurrently.First receiver 1536 is considered as impulsive noise and refusal as the high speed symbol of impulsive noise with blinker, or carries out other operation, for example with the high speed component as any other impulse noise signal may be processed operated in saturation.When will lower power signal being considered as background noise, receiver 2 1538 decoding blinkers.Composite signal 91554 to comprise simultaneously conventional similar with the composite signal 8 1520 of blinker.The information sets A ＂ 1550 that receives is corresponding to the first original good reproduction of launching information sets A 1150 in advance of Figure 11.Information sets B " 1552 the second original good reproductions of launching information sets B1160 in advance that receive corresponding to Figure 11.

Figure 16 represents that another kind of typical equipment is equipment 7 1562, for example base station or wireless terminal, and it comprises that one first receiver is that receiver 1 1563 and one second receiver are receiver 2 1564.Receiver 1 1563 comprises a decoder 1565 that contains a discard module 1570 and a correction module 1566.Receiver 2 1564 comprises a decoder 1566 that contains a background noise filtering 1567 and a secondary signal MTU identifier module 1568.Composite signal 10 1573 is received and enters receiver 2 1564.In the decoder 1566 of receiver 2 1564, signal can be filtered by background filtering 1567, and information is decoded and as information sets B " ' 1572, i.e. the original reproduction of launching information sets B 1160 in advance of Figure 11 and exporting.In addition, secondary signal MTU identifier module 1568 is discerned one group of MTU 1569 corresponding to second (flashing) signal, and sends described information 1573 to the decoder 1565 of receiver 1 1563.In certain embodiments, the MTU of identification group 1573 is in one of the homophase of the tone of different symbol times and quadrature component.

The discard module 1570 of the decoder 1565 in the receiver 1 1563 receives the MTU group 1573 of identification, and before information enters correction module 1566, refuses or remove the information that derives from those MTU unit.As an alternative, the information of the identification second or the MTU of " flashing " signal can be directly delivered to correction module 1566, correction module 1566 can be removed influence from those MTU." ' 1571 launch the reproduction of information sets 1150 corresponding to first of Figure 11 to information sets A in advance.Abandon the MTU of identification and they to the influence of lower power signals, becomes the contrast of distinctness with the stack decoding technique that need before can recovering basis signal, from the signal element that receives, accurately eliminate the prior art of high power signals component.

Although be described under the environment of ofdm system, method and apparatus of the present invention is applicable to communication system widely, comprises the system of many non-OFDM and/or non-honeycomb fashion.

In different embodiment, use one or more modules to implement node described here, to carry out the step corresponding to one or more methods of the present invention, for example signal processing, message generate and/or step of transmitting.Like this, in certain embodiments, each characteristic of the present invention is to use module to implement.This module can use the combination of software, hardware or software and hardware to implement.Many in above-described method or the method step can be used machine-executable instruction, for example, be included in machine readable media for example the software within memory device such as RAM, the floppy disk etc. implement, with the control machine, for example there is or do not have the all-purpose computer of additional hardware, thereby, for example in one or more nodes, implement all or part of above-described method.Therefore, what wherein need to illustrate a bit is, the present invention is directed to a kind of machine-executable instruction that comprises to cause machine, and for example processor and related hardware are carried out the machine readable media of the step of one or more methods mentioned above.

For those familiar with the art, in view of foregoing description of the present invention, the many extra variation of above-described method and apparatus of the present invention will be conspicuous.This variation will be believed to comprise within category of the present invention.Method and apparatus of the present invention is passable, and in different embodiment is, with CDMA, OFDM (OFDM) and/or various other types can be used for provide the communication technology of the wireless communication link between access node and the wireless terminal to use.In certain embodiments, the base station uses OFDM and/or CDMA and mobile node to set up communication link.In different embodiment, wireless terminal is comprised that as notebook computer, PDA(Personal Digital Assistant) or other portable set receiver/transmitter circuitry and logic and/or routine implement, to realize method of the present invention.

Technology of the present invention can use the combination of software, hardware and/or software and hardware to implement.The present invention is directed to device, for example implement wireless terminal of the present invention, base station, communication system.It is also at method, and for example according to the present invention, control and/or operate wireless terminal, base station and/or communication system be the method for main frame for example.The present invention is also at machine readable media, for example ROM, RAM, CD, hard disk etc., and it comprises that being used to control machine implements machine readable instructions according to one or more steps of the present invention.

Claims

1, a kind of method of using a transmission block to launch at least the first and second group information, described transmission block comprises a plurality of minimum transmission units, each minimum transmission units is corresponding to a unique combination of resources that is used to launch information, described resource comprises at least two in time, frequency, phase place and the spreading codes, and this method comprises:

Definition is used to transmit first group of described minimum transmission units of described first group of information, and described first group of minimum transmission units comprises the major part of described transmission block at least;

Define second group of described minimum transmission units, to be used to transmit described second group of information, described second group of minimum transmission units comprises with first group compares less minimum transmission units; At least some minimum transmission units in first and second groups of minimum transmission units are identical; And

The minimum transmission units that use is included in described first and second groups of minimum transmission units is transmitted first and second groups of information.

2. the process of claim 1 wherein described first group and second group of information comprise in user data and the control information one of at least, and described control information one of comprises in confirmation and the assignment information at least.

3. the process of claim 1 wherein that transmitting first and second groups of information comprises, launch signal respectively corresponding to described first and second groups of information from different transmitters.

4. the method for claim 3, wherein said different transmitter is placed on the different equipment.

5. the process of claim 1 wherein that transmitting first and second groups of information comprises from a transmitter and transmitting that this transmitter is used to launch the signal corresponding to described first and second groups of both information.

6. the process of claim 1 wherein that described first group of minimum transmission units comprises at least 75% of minimum transmission units sum in the described transmission block.

7. the method for claim 6, wherein said second group of minimum transmission units are less than half of minimum transmission units quantity of described first group of minimum transmission units.

8. the method for claim 6, each minimum transmission units that wherein is included in second group of minimum transmission units also is comprised in described first group of minimum transmission units.

9. the method for claim 1,

Wherein transmit first and second groups of information and comprise each minimum transmission units of using in described second group of minimum transmission units, launch described second group of information, and

Wherein transmitting first group of information comprises and uses at least some described first group of minimum transmission units to launch described first group of information.

10. the method for claim 9, wherein said at least some first group of minimum transmission units only comprise the minimum transmission units that is not included in described second group of minimum transmission units.

11. the method for claim 9, wherein said at least some described first group of minimum transmission units comprise the minimum transmission units in described second group.

12. the method for claim 11, wherein use first and second signals to transmit first and second groups of information at least respectively, and wherein said method further comprises combination first and second signals, forms described composite signal to be included in minimum transmission units in described first and second groups of minimum transmission units in use before launching composite signal.

13. the method for claim 12,

Wherein based on each minimum transmission units and to compare higher power level emission secondary signal with described first signal; And

Wherein transmitting first and second groups of information comprises:

Use is included in first signal corresponding to first group of information of minimum transmission units emission in described first group of minimum transmission units; And

The minimum transmission units that use is included in described second group of minimum transmission units is launched a secondary signal corresponding to second group of information.

14. the method for claim 13 is wherein launched power level corresponding to the minimum transmission units of secondary signal at least than the power level big 3dB of emission corresponding to the minimum transmission units of first signal.

15. the method for claim 13 further comprises the transmit power level that changes the minimum transmission units be used to launch described secondary signal.

16. the method for claim 13 further comprises the transmit power level that changes the minimum transmission units be used to launch described first signal.

17. the method for claim 4, wherein said distinct device are different wireless terminals.

18. the method for claim 5, wherein said transmitter is a base station transmitter.

19. the process of claim 1 wherein that described minimum transmission units comprises the resource composition of frequency and time.

20. the method for claim 19, wherein said minimum transmission units are the combinations of OFDM tone and OFDM symbol transmission time.

21. the process of claim 1 wherein that transmitting described first group of information comprises:

Before transmitting described first and second groups of information, abandon and be included in the part of the corresponding described first group of information of minimum transmission units in described second group of minimum transmission units.

22. the process of claim 1 wherein that transmitting first group of information comprises:

Before transmitting first and second groups of information, described first group of information is punctured operation, to abandon and to be included in the minimum transmission units information corresponding in described second group of minimum transmission units.

23. the described method of claim 22, wherein the described information that abandons by described puncture is by using error correction recoverable.

24. the process of claim 1 wherein that described second group of information comprises the assignment information of Traffic Channel part.

25. the method for claim 24 is wherein transmitted first and second groups of information and is comprised:

With higher power level, launch and described second group of information information corresponding on corresponding to the minimum transmission units of described second group of minimum transmission units, wherein said higher power level is higher than the power level of launching on the minimum transmission units that only is used for the described first group of information of transmitting portions in described first group of minimum transmission units with described first group of information information corresponding.

26. device that is used to receive the composite signal of first and second signals that comprise that the use transmission block is launched in time together, described secondary signal is received to compare higher power level with described first signal, described transmission block comprises a plurality of minimum transmission units, each minimum transmission units is corresponding to a unique combination of resources that is used to launch information, described resource comprises the time, frequency, in phase place and the spreading codes at least two, the transmission unit that is used to transmit described first and second signals comprises: i) be used to transmit first group of described minimum transmission units of first group of information, described first group of minimum transmission units comprises the most of transmission unit in the described transmission block; Ii) be used to transmit second group of minimum transmission units of second group of information, described second group of minimum transmission units comprises with first group compares less minimum transmission units; At least some minimum transmission units in described first and second groups of minimum transmission units are identical,

Described device comprises:

First receiver that is used to receive composite signal, described first receiver comprises:

I) one is used for from first filter module of the composite signal filtered pulse noise of described reception, and the part corresponding to secondary signal in the described composite signal is considered as impulsive noise by described filter module; And

Ii) first decoder corresponding to the information of first signal of being used to decode that is connected to described first filter module, described first decoder are determined the composite signal value that receives on first group of minimum transmission units; And

One second receiver, it comprises:

I) second filter module that is used for filtering background noise from the composite signal of described reception; And

Ii) second decoder of being used to decode that is connected to described second filter module corresponding to the information of secondary signal, described second decoder is determined the composite signal value that receives on second group of minimum transmission units, the major part in described second group of minimum transmission units is included in described first group of minimum transmission units.

27. the device of claim 26, wherein said first receiver is an ofdm signal receiver.

28. the device of claim 26, wherein said device is the base station.

29. the device of claim 26, wherein said device is a wireless terminal.

30. device that is used to receive the composite signal of first and second signals that comprise that the use transmission block is launched in time together, described secondary signal is received to compare higher power level with described first signal, described transmission block comprises a plurality of minimum transmission units, each minimum transmission units is corresponding to a unique combination of resources that is used to launch information, described resource comprises the time, frequency, in phase place and the spreading codes at least two, the transmission unit that is used to transmit described first and second signals comprises: i) be used to transmit first group of minimum transmission units of first group of information, described first group of minimum transmission units comprises the most of transmission unit in the described transmission block; Ii) be used to transmit second group of minimum transmission units of second group of information, described second group of minimum transmission units comprises with first group compares less minimum transmission units; At least some minimum transmission units in described first and second groups of minimum transmission units are identical,

Described device comprises:

One is used for receiving composite signal and is identified in second receiver of described composite signal corresponding to the minimum transmission units of described secondary signal, and the described second receiver output information is to discern the described minimum transmission units corresponding to secondary signal that identifies; And

First receiver that is used to receive described composite signal, described first receiver comprises the decoder of described composite signal corresponding to the part of described first signal that is used for decoding, described decoder receives the described second receiver output information, with discern described identify corresponding to the minimum transmission units of secondary signal and abandon the described minimum transmission units that identifies corresponding to secondary signal.

31. the device of a claim 30, the wherein said minimum transmission units corresponding to secondary signal that identifies are in one of the homophase of the tone of distinct symbols launch time and quadrature component.

32. the device of a claim 30, wherein said first receiver comprises:

Error correction circuit recovers owing to abandoning first signal message that the described minimum transmission units corresponding to secondary signal that identifies is lost being used to.

33. the device of claim 30, wherein said first receiver is an ofdm signal receiver.

34. the device of claim 30, wherein said device is the base station.

35. the device of claim 30, wherein said device is a wireless terminal.

36. device that is used to use the transmission block emission at least the first and second group information, described transmission block comprises a plurality of minimum transmission units, each minimum transmission units is corresponding to a unique combination of resources that is used to launch information, described resource comprises at least two in time, frequency, phase place and the spreading codes, and described device comprises:

Be identified for transmitting the device of first group of minimum transmission units of described first group of information, described first group of minimum transmission units comprises the major part in the described transmission block at least;

Be identified for transmitting second group of minimum transmission units device of described second group of information, described second group of minimum transmission units comprises with first group compares less minimum transmission units; At least some minimum transmission units in first and second groups of minimum transmission units are identical; And

Use is included in the device that minimum transmission units in described first and second groups of minimum transmission units is transmitted first and second groups of information.

37. the device of claim 36, wherein said information be at least in user data and the control information one of at least, and described control information comprise confirm and assignment information in one of at least.

38. comprising from different transmitters, the device of claim 36, the device that wherein transmits first and second groups of information launch device respectively corresponding to the signal of described first and second groups of information.

39. device that is used to receive composite signal, this composite signal comprises first and second signals that use transmission block together to launch in time, described secondary signal is received to compare higher power level with described first signal, described transmission block comprises a plurality of minimum transmission units, each minimum transmission units is corresponding to a unique combination of resources that is used to launch information, described resource comprises the time, frequency, in phase place and the spreading codes at least two, the transmission unit that is used to transmit described first and second signals comprises: i) be used to transmit first group of minimum transmission units of first group of information, described first group of minimum transmission units comprises the most of transmission unit in the described transmission block; Ii) be used to transmit second group of minimum transmission units of second group of information, described second group of minimum transmission units comprises with first group compares less minimum transmission units; At least some minimum transmission units in described first and second groups of minimum transmission units are identical,

This device comprises:

Be used to receive described composite signal, be identified in the described composite signal minimum transmission units corresponding to described secondary signal, output is used to discern the device of the information of the corresponding minimum transmission units of described secondary signal that identify and described; And

Be used to receive described composite signal and comprise the device of the decoding device of the part described composite signal corresponding that be used to decode with described first signal, wherein, described decoding device is used to receive the described information that is used to discern the corresponding minimum transmission units of described secondary signal that identify and described, and abandons the corresponding minimum transmission units of described secondary signal that identify and described.

40. the device of claim 39, the corresponding minimum transmission units of wherein said secondary signal that identify and described are homophase and the quadrature components at the tone of distinct symbols transmission time.

41. the device of claim 39 wherein is used to receive described composite signal and comprises that the device of the decoding device of the part described composite signal corresponding with described first signal that be used to decode comprises:

Be used to recover owing to the device that abandons first signal message that the corresponding transmission unit of described secondary signal that identify and described loses.