EP1683290A2

EP1683290A2 - Signal processing apparatus and method using multi-output mobile communication system

Info

Publication number: EP1683290A2
Application number: EP04800073A
Authority: EP
Inventors: Bong Hoe Kim; Dong Youn Seo
Original assignee: LG Electronics Inc
Current assignee: LG Electronics Inc
Priority date: 2003-11-10
Filing date: 2004-11-10
Publication date: 2006-07-26
Also published as: WO2005046062A2; WO2005046062A3

Abstract

The present invention provides a signal processing method in a mobile communication system and a corresponding transmitter system for use in a mobile communication system in applying HARQ to a MIMO system, by which error-detecting information enabling to decide whether a received signal is erroneous is appended for transmission. The present invention appends CRC (S31) to the data block transported from a higher layer so that HARQ can be efficiently applied to the MIMO system. The present invention segments the CRC-appended data block (S35) and then transmits the segmented data blocks via a plurality of antennas. Data streams generated from the segmented data blocks are independent from each other in coding scheme and modulation.

Description

SIGNAL PROCESSING APPARATUS AND METHOD USING MULTI-OUTPUT MOBILE COMMUNICATION SYSTEM

Field of the Invention

The present invention relates to mobile communication system, and in particular, to a

signal processing apparatus for segmenting data blocks appended with error checking

information in a multi-input multi-output (MIMO) system for transmitting/receiving

using a plurality of antennas.

Background Art

HARQ (Hybrid Automatic Request), which is applicable to the V-BLAST (Vertical

Bell Laboratories Layered Space Time) system as one of the MIMO (multi-input multi-

output) systems and the HSDPA (high speed downlink packet access) system, according

to a related art is explained as follows. FIG. 1 is a block diagram of the V-BLAST system utilizing the MIMO antenna

processing. Referring to FIG. 1, transport data 11 is inputted to a vector encoder 12 in a

transmitting side. The vector encoder 12 is provided with a serial-to-parallel circuit for

transferring the transport data in parallel via N-antennas 13. A modulation system and a

channelization code number of the data transferred via the N-antennas 13 can be setup

differently. Such a code having orthogonality as OVSF (orthogonal variable spreading

factor) code is used as the channelization code.

When performing the channelization coding using the code having the orthogonality, a separate signal processing or space-time code is not used in spite of using a plurality of

the transmitting antennas 13. Namely, the inputted data are independently transmitted via

a plurality of the antennas.

When transmitting a signal via the N-antennas, the modulation scheme and the

channelization code number can be differentiated for each antenna. Namely, if a

transmitting end is provided with the information for a channel status transmitted via

each antenna, QAM (quadrature amplitude modulation) is used for the antenna having a

good channel status and more multi-codes are allocated to transmissions. On the other

hand, QPSK (quadrature phase shift keying) is used for the antenna in poor channel status

and less multi-codes are allocated to the transmissions.

In the transmitting end, such as a base station, each signal differing in the modulation

scheme and multi-code number is independently transmitted via each antenna and a

separate signal processing using interoperability between antennas is not carried out for

transmission quality enhancement. Thus, the transmitting end uses a plurality of the

antennas 13 and the respective antennas transmit signals independently. Meanwhile, a

receiving end receives signals using a plurality of receiving antennas 14 that receive the

signals transmitted from a plurality of the transmitting antennas, respectively. A V-

BLAST signal processing unit 15 of the receiving end detects the signals that are

independently transmitted via the respective transmitting antennas to be received via the

respective receiving antennas 14.

In the receiving end, such as a mobile terminal, in order to detect the signal

transmitted from a specific one of the transmitting antennas, other signals transmitted from other transmitting antenna are regarded as interference signals. A weight vector of a

receiving array antenna is computed for each signal transmitted from the corresponding

one of the transmitting antennas and the influence for the previously detected signal in

the receiving end is removed. Meanwhile, a method of detecting the signals transmitted

from the respective transmitting antennas in order of a size of a signal to interference

noise ratio can be used as well.

The V-BLAST is disclosed in P.W. Wolniansky, G. J.Foschini, G.D. Golden and R.

A. Valenzuela, "V-BLAST: An Architecture for Realizing Very High Data Rates Over

the Rich-Scattering Wireless Channel", IEE Electronics Letters, vol. 35, no. 1, pp. 14-16,

January, 1999.

In the HSDPA system, AMC (Adaptive Modulation and Coding) and HARQ are

adopted for downlink high data rate packet transmission. In AMC, data can be transferred

at an optimal data rate according to a current channel status in a manner of changing

modulation or coding rate variably in accordance with a channel status. HARQ combines channel coding and ARQ (automatic repeat request). The ARQ

checks a presence or non-presence of error of a transferred packet in a receiving end and

feeds back the corresponding result to a transmitting end, whereby the packet having the

packet transmission error is retransmitted. In case of feeding back the presence or non-

presence of the packet transmission error to the transmitting end, ACK

(acknowledgement) for reception success or NACK (negative acknowledgment) for

reception failure is transmitted. Even if there exists an error in the already received

packet, HARQ does not discard the erroneous packet but combines it with the retransmitted packet to decode. Hence, HARQ increases a diversity or coding gain.

In case of applying HARQ to the V-BLAST system, an error check method for

deciding the transmission success or failure is needed.

However, the related art method fails to propose how the error check bit is appended

to the data block, how the data block is segmented to be transmitted via the respective

antennas. Hence, HARQ is not applicable to the V-BLAST system.

Disclosure of Invention

Accordingly, the present invention is directed to a signal processing method in a

multi-input multi-output (MIMO) system that substantially obviates one or more

problems due to limitations and disadvantages of the related art.

An object of the present invention is to provide a signal processing in applying

HARQ to an MIMO system, by which error detecting information enabling to decide

whether a received signal is erroneous is appended for transmission. Additional advantages, objects, and features of the invention will be set forth in part

in the description which follows and in part will become apparent to those having

ordinary skill in the art upon examination of the following or may be learned from

practice of the invention. The objectives and other advantages of the invention may be

realized and attained by the structure particularly pointed out in the written description

and claims hereof as well as the appended drawings.

To achieve these objects and other advantages and in accordance with the purpose of

the invention, as embodied and broadly described herein, in a communication system having a plurality of antennas, the communication system transmitting signals in a

manner of applying separate weights to the signals transmitted via the antennas,

respectively, a transmission signal processing method according to the present invention

includes the steps of appending an information for an error detection to one data block

and generating at least two data streams from the error detection information appended

data block.

According to one embodiment of the invention, a signal processing method in a

mobile communication system utilizing a plurality of data streams capable of being

transmitted using a multiple-output antenna, comprises: selecting a modulation scheme

(for example, QPSK or 16 QAM) and a number of multicodes (for example, Walsh codes

used for the CDMA system) for each data stream, wherein each data stream is capable of

processing a predetermined data rate; generating channel coded data from a transport

block data appended with error correction bits; performing spatial segmentation on the

channel coded data to provide corresponding segmented data block to the plurality of

data streams, wherein the channel coded data comprises the transport block data and the

error correction bits (for example, CRC bits) and tail bits, and a size of the segmented

data block corresponds to a code rate of a channel coder; and generating rate matched

data for each one of the plurality of data streams.

According to one aspect of the invention, the size of the segmented data block is

proportionally determined based on a data rate capacity of each data stream. Preferably,

the size of the segmented data block is a multiple of a number of output bits associated

with the code rate. For example, when the code rate is 1/3, the size of the segmented data block is a multiple of 3.

According to another aspect of the invention, a plurality of code rates may be

concurrently used for the plurality of data streams. In other words, two data streams may

be concurrently using different code rates. According to another embodiment of the present invention, a signal processing

method comprises: selecting a modulation scheme and a number of multicodes for each

data stream, wherein each data stream is capable of processing a predetermined data rate;

generating channel coded data from a transport block data; rate matching the channel

coded data to generate rate matched data, wherein a data block size for rate matching is

associated with a code rate of a channel coder, error correction bits and tail bits; and

performing spatial segmentation on the channel coded and rate matched data to provide

corresponding segmented data block to a plurality of data streams, wherein the channel

coded and rate matched data comprises at least the transport block data and error

correction data, (for example, CRC bits) and tail bits. According to one aspect of the invention, the step of rate matching comprises one of

puncturing output bits and repeating output bits. In addition, the same code rate is

preferably used for the plurality of data streams.

According to another embodiment of the present invention, a signal processing

data stream used for processing a transport data block, wherein each data stream is

capable of processing a predetermined data rate; performing spatial segmentation on the

transport data block to provide corresponding segmented data block to the plurality of data streams, wherein input data of the spatial segmentation comprises the transport block

data and error correction data; generating channel coded data from the segmented data

block for each one of the plurality of data streams; and generating rate matched data from

the channel coded data for each one of the plurality of data streams. According to one aspect of the invention, a bit scrambling may be performed before

or after performing the spatial segmentation.

According to yet another embodiment of the present invention, a signal processing

method comprises: receiving a transport block data; appending error correction bits to the

transport block data; generating channel coded data from a transport block data appended

with the error correction bits; performing spatial segmentation on the channel coded data

to provide corresponding segmented data block to the plurality of data streams;

generating rate matched data for each one of the plurality of data streams; and

transmitting each one of the plurality of data stream to a receiving system using multiple-

output antennas. According to another embodiment of the present invention, the processes described

above may be implemented in a vector encoder operatively connected to a plurality of

transmission modules which is operatively connected to a plurality of antennas.

Preferably, each one of the plurality of antennas is associated with transmitting at least

one of the plurality of data streams. The vector encoder comprises a signal processor for

performing the above described processes.

Accordingly, the present invention appends the error check information to the data

block to be transmitted, segments the information-appended data block, and then transmits the segmented data blocks. Hence, the present invention enables to efficiently

apply HARQ to the MIMO system.

It is to be understood that both the foregoing general description and the following

detailed description of the present invention are exemplary and explanatory and are

intended to provide further explanation of the invention as claimed.

Brief Description of Drawings

The accompanying drawings, which are included to provide a further understanding

of the invention and are incorporated in and constitute a part of this application, illustrate

embodiment(s) of the invention and together with the description serve to explain the

principle of the invention. In the drawings:

FIG. 1 is a block diagram of the V-BLAST system incorporating the present

invention.

FIG. 2 is a process flowchart for generating a plurality of data streams from a data

block transported from a higher layer according to a first embodiment of the present

invention.

FIG. 3 is a process flowchart for generating a plurality of data streams from a data

block transported from a higher layer according to a second embodiment of the present

invention. FIG. 4 is a process flowchart for generating a plurality of data streams from a data

block transported from a higher layer according to a third embodiment of the present

invention. FIG. 5 is a process flowchart for generating a plurality of data streams from a data

block transported from a higher layer according to a fourth embodiment of the present

invention.

FIG. 6 is a diagram of a process of performing spatial segmentation according to the

preferred embodiment of the present invention.

Best Mode for Carrying Out the Invention

The various embodiments described herein are preferably implemented in a physical

layer of a transmitting system, such as a base station or a mobile terminal. The physical

layer provides information transfer service to a higher layer and is linked via transport

channels to a medium access control layer.

The Reference will now be made in detail to the preferred embodiments of the present

invention, examples of which are illustrated in the accompanying drawings. Wherever

possible, the same reference numbers will be used throughout the drawings to refer to the

same or like parts. FIG. 2 is a process flowchart for generating a plurality of data streams

from a data block transported according to a first embodiment of the present invention. In

this embodiment, it is assumed that only one transport block is being processed per TTI

(Transmission Time Interval). In FIG. 2, the spatial segmentation and the channel coding

are performed before rate matching. A spatial segmentation is required to segment an

input block into multiple blocks for simultaneous transmission of multiple data streams. Referring to FIG. 2, a data block delivered from a higher layer of the transmitting

system is appended with error check information to be used in a receiving system (S31). Preferably, CRC (cyclic redundancy check) can be used as the error check information.

Preferably, the higher layer selects the modulation scheme, such as QPSK or 16 QAM,

and the number of multicodes, such as the Walsh codes in the CDMA system, of each

stream. In addition, higher layer informs physical layer of the number of inputs bits to

each rate matching block.

Bit scrambling (S32), code block segmentation (S33), and channel coding (S34) are

carried out on the CRC-bit appended data block. In order to generate independent data

streams amounting to 'N' from the channel-coded data block, segmentation is performed

on the data block (S35). The segmentation of the data block is carried out in a manner of

segmenting one data block according to a regular rule spatially, which will be called

'spatial segmentation' in the following.

After completion of the spatial segmentation (S35), rate matching is independently

carried out on each of the segmented data blocks (S36). Preferably, in order to provide

different modulation and coding scheme for each data stream (for example, stream 1 to

stream N), the rate matching is performed for each data stream. If the rate matching (S36)

is independently performed on each of the segmented data blocks, the segmented data

blocks can be provided with different code rates, respectively. The coding rate is

generally represented as r = k/n, wherein k is input bit sequence and n is number of

output bit. A plurality of data streams are formed via physical channel segmentation (S37)

performed on the rate-matched data blocks, respectively. Interleaving is then carried out

on the respective streams (S38). When performing 16 QAM, the constellation rearrangement is carried out (S39). Alternatively, when performing QPSK, the

constellation rearrangement is unnecessary, and thus such step may be bypassed. Each

data stream is mapped to physical channels (S40).

invention. In FIG. 3, the spatial segmentation is preferably performed after the channel

coding and the rate matching.

In the second embodiment, the number of bits transmitted in physical channel during

a TTI is dependent on the modulation scheme and the number of multicodes of each

stream. A rate matched data block is to be segmented in proportion to the ratio of the

number of bits per stream. Since a transport block goes through one rate matching block,

the code rates of all streams are the same. In other words, the modulation scheme and the

number of multicodes can be separately controlled per stream but code rate cannot be

separately controlled per stream. Referring to FIG. 3, a data block delivered from an upper layer of the system is

appended with error check information in a receiving end in step S41. Preferably, CRC

(cyclic redundancy check) can be used as the error check information.

Bit scrambling (S42), code block segmentation (S43), and channel coding (S44) are

carried out on the CRC-bit appended data block. The rate matching (S45) is carried out

on data blocks. Then spatial segmentation (S46) is carried out on the data block to

generate independent data streams amounting to 'N' from the channel-coded and rate

matched data block. Because the spatial segmentation is performed after completing the rate matching on one data block, each of the data streams can be provided with the same

modulation and coding scheme.

A plurality of data streams (that are rate matched) are then subjected to physical

channel segmentation (S47). Interleaving is then carried out on the respective streams

(S48). When performing 16 QAM, the constellation rearrangement is carried out (S29).

Alternatively, when performing QPSK, the constellation rearrangement is unnecessary,

and thus such step may be bypassed. Each data stream is mapped to physical channels

(S30).

FIG. 4 is a process flowchart for generating a plurality of data streams from a data

invention. In FIG. 4, the channel coding and the rate matching for each data stream are

preferably performed after the spatial segmentation.

Referring to FIG. 4, once a data block is delivered from a higher layer, error check

information in a receiving end is appended to the data block (S61). CRC (cyclic

redundancy check) can be used as the information for the error check.

The bit scrambling (S62) and the spatial segmentation (S63) are carried out on the

CRC-bit appended data block, in turn. The spatial segmentation (S63) generates

independent data streams amounting to 'N' from one data block delivered from the

higher layer. After completion of spatial segmentation (S63), code block segmentation

(S64) and channel coding (S65) are carried out on the respective segmented data streams. After rate matching (S66) has been performed on the channel-coded data block, the

physical channel segmentation (S67) is performed on the rate-matched data blocks. Thereafter, data interleaving is carried out on the respective streams (S68). When

performing 16 QAM, constellation rearrangement is carried out (S69). Alternatively,

when using QPSK, constellation rearrangement is unnecessary. The streams are mapped

to physical channels, respectively (S60). FIG. 5 is a process flowchart for generating a plurality of data streams from a data

invention. The embodiment illustrated in FIG. 5 similar to the embodiment illustrated in

FIG. 4 except that the bit scrambling is performed after the spatial segmentation.

Referring to FIG. 5, once a data block is delivered from a higher layer, error check

information in a receiving end is appended to the data block (S81). CRC (cyclic

redundancy check) can be used as the information for the error check.

The spatial segmentation (S82) are carried out on the CRC-bit appended data block.

The spatial segmentation (S82) generates independent data streams amounting to 'N'

from one data block delivered from the higher layer. After completion of spatial

segmentation (S82), the bit scrambling (S83), code block segmentation (S84) and channel

coding (S85) are carried out on the respective segmented data streams.

After rate matching (S86) has been performed on the channel-coded data block, the

physical channel segmentation (S87) is performed on the rate-matched data blocks.

Thereafter, data interleaving is carried out on the respective streams (S88). When

performing 16 QAM, constellation rearrangement is carried out (S89). Alternatively,

to physical channels, respectively (S90). FIG. 6 is a diagram illustrating the spatial segmentation of data block according to the

preferred embodiment of the present invention. FIG. 6 shows one of multiple data

streams being transmitted via one antenna. Alternatively, a plurality of multiplexed

streams can be transmitted via one antenna. Referring to FIG. 6, an error check bit 92 is appended to one data block 91 transferred

from a higher layer. Assuming that a data block having a size of 'N' is delivered from a

higher layer, CRC having a 24-bits length is appended to the data block. If channel

coding having a 1/3 coding rate is performed thereon, a size of the data block becomes

N_d-bits. A size of N_d can be found by Equation 1. And, '12' in Equation 1 indicates a

turbo code tail added in turbo coding. Equation 1 relates to Fig 2. [Equation 1]

N_d = 3(N + 24) + 12 If rate matching is performed on the data block, the size Ν_d of the data block can be

found by Equation 2. And, ' Δ ' in Equation 2 is a negative value if rate matching requires

puncturing (to reduce the excessive bits) or a positive value if rate matching requires

repetition (to increase the number of bits). Equation 2 relates to Fig 3. [Equation 2]

N_rf = 3(N +24) + 12 + Δ If there are M transmitting antennas, the modulation and multi-coding number can be

expressed by (m^ ,c ) (j=l, 2,...,M). In this case, m indicates a modulation scheme of a

j^th antenna. In case of QPSK, it is determined m_} =1. In case of 16 QAM, it is determined

m _j =2. Meanwhile, c indicates the number of multi-codes used in sending data transmitted via the j^th antenna.

Preferably, the number of multi-codes can be converted into a coding rate. Namely, in

HSDPA, SF (spreading factor) is 16 and QPSK or 16 QAM is used. Hence, data

transmittable via one HS-DSCH sub-frame are 960-bits or 1,920-bits. The number of

data bits substantially transmitted is found by multiplying the data bits transmitted via the

HS-DSCH sub-frame by the multi-code number c_} . Hence, the coding rate becomes

N/(960*c) in case of QPSK or N/(1920*c) in case of 16 QAM.

Thus, in case of performing spatial segmentation on one CRC-appended data block

91 into the respective data streams, a ratio of a data amount allotted to a specific data

stream among total data transport amount should be taken into consideration. Namely, the

data block should be segmented to correspond to the modulation and multi-code number

applied to each of the streams. Equation 3 determines a size of the segmented data block

in segmenting the data block 91 into the respective data streams.

[Equation 3]

N data,) N d. M ' ^J ,j=l,- ,M In Equation 3, 'j' indicates &ή index- ΌΓ each of the segmented data streams and

N ^' _lbl indicates a size of a j^th data stream. N _{da j} is computed using a ratio of a data

transport rate ( m₇ c_} ) allotted to the j^th stream among the total data transport rate M

( Σ ^m _j ^C _J ) *^{n e s}'^ze ^^d °f the data block before segmentation. Meanwhile, since each

of the streams consists of bits of a positive number, a ' |_ J ' operation is executed.

In case of turbo coding having a 1/3 coding rate, the size of the data block inputted

for rate matching becomes a multiple of '3'. Hence, if the N _{d a} value computed by Equation 2 fails to be the multiple of '3', the size of the j^th data stream can be determined

as a multiple of '3' not exceeding N _{ώm j} . For instance, if the N _dala value computed by

Equation 2 is 14, the size of the j^th data stream can be determined as 12.

By the ' |_ J ' operation or an operation for making N _{dala J} a multiple of "3", it may M occur N_juω ≠ Nr_f • Hence, it is necessary to distribute bits amounting to /=1 M

N_d - ^ N_dalaJ (remaining bits) to the respective streams. In doing so, the remaining

bits can be distributed to each stream one by one until there exists no more bit to be

distributed. Alternatively, the remaining bits can be distributed to the respective data

streams by 3-bits each. The above scheme may be explained the best by an example referring to FIG. 2.

Assume that the size Ν_d of the data block is 30 bits and the coding rate is 1/3. The 30-bit

data block is subjected to the spatial segmentation (S35). Let's assume that there are 3

data streams, wherein Stream 1 can process 10 bits, Stream 2 can process 5 bits, and

Stream 3 can process 25 bits. Hence the total number of bits that can be processed by

Stream 1, Stream 2, and Stream 3 are 40 bits (10+5+25). The spatial segmentation

module then determines and segments the 30-bits into these three streams, wherein the

input to each respective stream has to be a multiple of 3 (because the coding rate is 1/3).

For Stream 1, the spatial segmentation module determines N_rfαtoιl to be 6 bits: (10

bits x 30 input bits) / (40 total stream bits) = 7.5; and thus the next lower bit that is a

multiple of 3 is "6".

For Stream 2, the spatial segmentation module determines N_Λ((αj2 to be 3 bits: (5 bits

x 30 input bits) / (40 total stream bits) = 3.8; and thus the next lower bit that is a multiple of 3 is "3".

For Stream 3, the spatial segmentation module determines N_{Λ/to 3} to be 18 bits: (25

bits x 30 input bits) / (40 total stream bits) = 18.8; and thus the next lower bit that is a

multiple of 3 is "18". As a result, the total number of bits are:

[6 bits (for Stream 1) + 3 bits (for Stream 2) + 18 bits (for Stream 3)] = 27 bits. The remaining bits are 3 bits (difference between Ν and 27 bits). And the remaining

bits must be assigned to one of the data streams by the spatial segmentation module (S35).

Preferably, the remaining 3 bits are assigned to Stream 1, thus allowing Stream 1 to

process a total of 9 bits, which is still a multiple of 3.

An operation of the receiving end of the present invention is explained as follows.

First of all, reception data are passed through the following steps so that signals

transmitted from the transmitting end via the respective antennas are detected. When the

signal transmitted via a specific transmitting antenna is detected in the receiving end,

other signals transmitted via other transmitting antennas are regarded as interference

signals. Namely, a weight vector of a receiving array antenna is computed for each signal

transmitted from the conesponding one of the transmitting antennas and the influence for

the previously detected signal in the receiving end is removed. Meanwhile, a method of

detecting the signals transmitted from the respective transmitting antennas in the order of

a signal strength to interference noise ratio can be used as well.

The signals detected for the transmitting antennas in the above-explained manner are

deplexed to be separated into the data streams, respectively. The data streams are passed through the parallel-to-serial circuit to be united into one data block and are then decoded. In the transmitting end, one information (CRC) for the enor check is appended to one

data block and the CRC-appended data block is then segmented to be transmitted. Hence,

it is able to check whether the received data block is enoneous only after the segmented

data blocks have been united into one data block again. For the enor check, after

decoding has been performed on the data block, whether the received data block is

enoneous is decided using the CRC appended to the data block.

In accordance with HARQ algorithm, an acknowledgment (ACK) signal in case of

successful reception or a non-acknowledgment (NACK) signal in case of reception

failure is fed back to the transmitting end as a result of the enor check. If the

transmitting end receives the ACK signal a new data block is transmitted. If the

transmitting end receives the NACK signal, the same data block previously transmitted is

retransmitted to the receiving end.

block to be transmitted, segments the information-appended data block, and then

transmits the segmented data blocks. Hence, the present invention enables to efficiently

apply HARQ to the MIMO system.

Although the present invention is described in the context of mobile communication,

the present invention may also be used in any wireless communication systems using

mobile devices, such as PDAs and laptop computers equipped with wireless

communication capabilities. Moreover, the use of certain terms to describe the present

invention should not limit the scope of the present invention to certain type of wireless communication system, such as UMTS. The present invention is also applicable to other

wireless communication systems using different air interfaces and/or physical layers, for

example, TDMA, CDMA, FDMA, WCDMA, etc.

The preferred embodiments may be implemented as a method, apparatus or article of

manufacture using standard programming and/or engineering techniques to produce

software, firmware, hardware, or any combination thereof. The term "article of

manufacture" as used herein refers to code or logic implemented in hardware logic (e.g.,

an integrated circuit chip, Field Programmable Gate Anay (FPGA), Application Specific

Integrated Circuit (ASIC), etc.) or a computer readable medium (e.g., magnetic storage

medium (e.g., hard disk drives, floppy disks, tape, etc.), optical storage (CD-ROMs,

optical disks, etc.), volatile and non-volatile memory devices (e.g., EEPROMs, ROMs,

PROMs, RAMs, DRAMs, SRAMs, firmware, programmable logic, etc.).

Code in the computer readable medium is accessed and executed by a processor. The

code in which preferred embodiments are implemented may further be accessible through

a transmission media or from a file server over a network. In such cases, the article of

manufacture in which the code is implemented may comprise a transmission media, such

as a network transmission line, wireless transmission media, signals propagating through

space, radio waves, infrared signals, etc. Of course, those skilled in the art will recognize

that many modifications may be made to this configuration without departing from the

scope of the present invention, and that the article of manufacture may comprise any

information bearing medium known in the art.

The logic implementation shown in the figures described specific operations as occurring in a particular order. In alternative implementations, certain of the logic

operations may be performed in a different order, modified or removed and still

implement prefened embodiments of the present invention. Moreover, steps may be

added to the above described logic and still conform to implementations of the invention. It will be apparent to one skilled in the art that the prefened embodiments of the

present invention can be readily implemented using, for example, a processor or other

data or digital processing device, either alone or in combination with external support

logic residing in the vector encoder 12 of the transmitting system (FIG. 1).

It will be apparent to those skilled in the art that various modifications and variations

can be made in the present invention. Thus, it is intended that the present invention

covers the modifications and variations of this invention provided they come within the

scope of the appended claims and their equivalents.

Claims

What is claimed is:

1. A signal processing method in a mobile communication system utilizing a

plurality of data streams capable of being transmitted using a multiple-output antenna, the

method comprising: selecting a modulation scheme and a number of multicodes for each data

stream, wherein each data stream is capable of processing a predetermined data rate; generating channel coded data from a transport block data appended with

error conection bits; performing spatial segmentation on the channel coded data to provide

conesponding segmented data block to the plurality of data streams, wherein the channel

coded data comprises the transport block data and the enor correction bits and tail bits,

and a size of the segmented data block corresponds to a code rate of a channel coder; and generating rate matched data for each one of the plurality of data streams.

2. The signal processing method of claim 1, wherein the size of the

segmented data block is proportionally determined based on a data rate capacity of each

data stream.

3. The signal processing method of claim 2, wherein the size of the

segmented data block is a multiple of a number of output bits associated with the code

rate.

4. The signal processing method of claim 1, wherein when the code rate is

1/3, the size of the segmented data block is a multiple of 3.

5. The signal processing method of claim 1, wherein a plurality of code rates

are concunently used for the plurality of data streams.

6. The signal processing method of claim 1, further comprising: generating physical channel segmentation data for the rate matched data for

each one of the plurality of data streams.

7. A signal processing method in a mobile communication system utilizing a

stream, wherein each data stream is capable of processing a predetermined data rate; generating channel coded data from a transport block data; rate matching the channel coded data to generate rate matched data, wherein a

data block size for rate matching is associated with a code rate of a channel coder, error

conection bits and tail bits ; and performing spatial segmentation on the channel coded and rate matched data

to provide corresponding segmented data block to a plurality of data streams, wherein the

channel coded and rate matched data comprises at least the transport block data and enor

conection data, tail bits.

8. The signal processing method of claim 7, wherein the step of rate

matching comprises one of puncturing output bits and repeating output bits.

9. The signal processing method of claim 7, wherein the same code rate is

used for the plurality of data streams.

10. The signal processing method of claim 7, further comprising: generating physical channel segmentation data for the spatial segmented data

for each one of the plurality of data streams.

11. A signal processing method in a mobile communication system utilizing a

stream used for processing a transport data block, wherein each data stream is capable of

processing a predetermined data rate; performing spatial segmentation on the transport data block to provide

conesponding segmented data block to the plurality of data streams, wherein input data

of the spatial segmentation comprises the transport block data and error correction data; generating channel coded data from the segmented data block for each one of

the plurality of data streams; and generating rate matched data from the channel coded data for each one of the

plurality of data streams.

12. The signal processing method of claim 11, wherein a bit scrambling is

performed before performing the spatial segmentation.

13. The signal processing method of claim 11, wherein a bit scrambling is

performed after performing the spatial segmentation.

14. The signal processing method of claim 11, wherein the size of the

data stream and is multiple of the coding rate.

15. The signal processing method of claim 14, wherein the size of the

rate.

16. The signal processing method of claim 11 , wherein when the code rate is

1/3, the size of the segmented data block is a multiple of 3.

17. The signal processing method of claim 11, wherein a plurality of code

rates are concunently used for the plurality of data streams.

18. The signal processing method of claim 11, further comprising: generating physical channel segmentation data for the rate matched data for

each one of the plurality of data streams.

19. A signal processing method in a mobile communication system utilizing a

method comprising: receiving a transport block data; appending enor conection bits to the transport block data; generating channel coded data from a transport block data appended with

the enor conection bits; performing spatial segmentation on the channel coded data to provide

conesponding segmented data block to the plurality of data streams; generating rate matched data for each one of the plurality of data streams;

and transmitting each one of the plurality of data stream to a receiving system

using multiple-output antennas.

20. A transmitter system for use in a mobile communication system utilizing a

plurality of data streams capable of being concunently transmitted, the transmitter system

comprising: a vector encoder operatively connected to a plurality of transmission

modules; and a plurality of antennas operatively connected to conesponding transmission

module, each one of the plurality of antennas associated with transmitting at least one of

the plurality of data streams, wherein the vector encoder comprises a signal processor for: selecting a modulation scheme and a number of multicodes for each data

corresponding segmented data block to the plurality of data streams, wherein the channel

21. The transmitter system of claim 20, wherein the size of the segmented data

block is proportionally determined based on a data rate capacity of each data stream.

22. The transmitting system of claim 21, wherein the size of the segmented

data block is a multiple of a number of output bits associated with the code rate.

23. The transmitter system of claim 20, wherein when the code rate is 1/3, the

size of the segmented data block is a multiple of 3.

24. The transmitter system of claim 20, wherein a plurality of code rates are

concurrently used for the plurality of data streams.

25. A transmitter system for use in a mobile communication system utilizing a

plurality of data streams capable of being concurrently transmitted, the transmitter system

comprising: a vector encoder operatively connected to a plurality of transmission modules;

and a plurality of antennas operatively connected to conesponding transmission

data block size for rate matching is associated with a code rate of a channel coder, enor

conection bits and tail bits; and performing spatial segmentation on the channel coded and rate matched data

to provide conesponding segmented data block to a plurality of data streams, wherein the

channel coded and rate matched data comprises at least the transport block data and error

conection data, tail bits.

26. The transmitter system of claim 25, wherein the step of rate matching

comprises one of puncturing output bits and repeating output bits.

27. The transmitter system of claim 25, wherein the same code rate is used for

the plurality of data streams.

28. A transmitter system for use in a mobile communication system utilizing a

and a plurality of antennas operatively connected to conesponding transmission

of the spatial segmentation comprises the transport block data and enor conection data; generating channel coded data from the segmented data block for each one of

plurality of data streams.

29. The transmitter system of claim 28, wherein a bit scrambling is performed

before performing the spatial segmentation.

30. The transmitter system of claim 29, wherein a bit scrambling is performed

after performing the spatial segmentation.

31. The transmitter system of claim 29, wherein the size of the segmented data

block is proportionally determined based on a data rate capacity of each data stream and

is multiple of the coding rate.

32. The transmitter system of claim 31, wherein the size of the segmented data

block is a multiple of a number of output bits associated with the code rate.

33. The transmitter system of claim 29, wherein when the code rate is 1/3, the

size of the segmented data block is a multiple of 3.

34. The transmitter system of claim 29, wherein a plurality of code rates are

concunently used for the plurality of data streams.

35. The transmitter system of claim 29, further comprising: generating physical channel segmentation data for the rate matched data

for each one of the plurality of data streams.

36. A transmitter system for use in a mobile communication system utilizing a

plurality of data streams capable of being concunently transmitted, the transmitter

system comprising: a vector encoder operatively connected to a plurality of transmission modules;

and a plurality of antennas operatively connected to conesponding transmission

the plurality of data streams, wherein the vector encoder comprises a signal processor

for: receiving a transport block data; appending enor conection bits to the transport block data; generating channel coded data from a transport block data appended with the

enor conection bits; performing spatial segmentation on the channel coded data to provide

conesponding segmented data block to the plurality of data streams; generating rate matched data for each one of the plurality of data streams; and transmitting each one of the plurality of data stream to a receiving system

using multiple-output antennas.