TW589818B - Method of transmit diversity using TDD wideband multi-carrier DS-CDMA system - Google Patents

Method of transmit diversity using TDD wideband multi-carrier DS-CDMA system Download PDF

Info

Publication number
TW589818B
TW589818B TW91134104A TW91134104A TW589818B TW 589818 B TW589818 B TW 589818B TW 91134104 A TW91134104 A TW 91134104A TW 91134104 A TW91134104 A TW 91134104A TW 589818 B TW589818 B TW 589818B
Authority
TW
Taiwan
Prior art keywords
carrier
signal
different
multiple
spread
Prior art date
Application number
TW91134104A
Other languages
Chinese (zh)
Other versions
TW200409480A (en
Inventor
Juinn-Horng Deng
Ta-Sung Lee
Chien-Hsing Liao
Original Assignee
Chung Shan Inst Of Science
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Chung Shan Inst Of Science filed Critical Chung Shan Inst Of Science
Priority to TW91134104A priority Critical patent/TW589818B/en
Application granted granted Critical
Publication of TW200409480A publication Critical patent/TW200409480A/en
Publication of TW589818B publication Critical patent/TW589818B/en

Links

Abstract

A method of transmit diversity using TDD wideband multi-carrier DS-CDMA system comprise using frequency domain and spacing domain for shooting signal to achieve high-speed-down-chain parallel transferring; channel gain using up-chain receiving on TDD, therefore, the invention showing down-chain sending by beforehand of frequency domain and spacing domain to achieve high capacity and speed; using many an orthogonal frequency generator for per carrier wave to transfer channel signal with IFFT and protecting channel processor, therefore, the invention to achieve high speed wide-band parallel data transferring for carrier waves; and collecting gain by many an antennas for receiver using FFT and frequency wave filter, therefore, the invention provides a shooting collecting gain.

Description

589818 V. Description of the invention (1) [Field of the invention] The present invention relates to a transmission and distribution method for a time-division duplex wideband multi-carrier direct-sequence code division multiple access system, which is suitable for manufacturing with VLSI and conforms to a single-chip system. on Chip, SOC) design concept, which further conforms to the future design of "thin, light and short" receivers. [Related technology description] In spread spectrum communication, the traditional transmit diversity technology can be divided into the following methods. First, the conventional transmit diversity technology uses a space-time block coding method to achieve the purpose of transmit diversity, such as S · M · Alamouti and V. Tarokh in 1 Transmitter diversity technique for wireless communications " U.S. Patent 6, 1 85, 2 58 and, 'A simple transmitter diversity scheme for wireless communications,' IEEE J. Select. Areas Commun., Vol. 16, pp. 1451-1458, Oct. 1998 For example, the user station receiver described in this article is suitable for a single path attenuation channel environment to obtain transmit diversity gain. Although the user station described in this article can obtain transmit diversity gain, its receiver can only be used in A single path attenuation channel is not suitable for multiple path attenuation channels. Other transmit diversity methods for multiple path attenuation channels have also been proposed, such as AJ Paulraj, et a 1. 丨 Wireless communication system and method using stochastic space-time / frequency division multiplexing " U.

589818 V. Description of the invention (2) S. Patent 6,377,632 and R. Esmailzadeh, E. Sourour, and M. Nakagawa, " Pre-RAKE diversity combining in time division duplex CDMA mobile communications, 11 IEEE Trans. On Vehicular Technology, vol. 48, pp. 795-801, May 1999. Among them, the Pre-RAKE method, the user station receiver described in this article is suitable for a single user and multiple path attenuation channel environment, and can obtain transmit diversity gain. Although the user station described in this article can obtain transmit diversity gain, its receiver can only be used in a single user environment, and cannot deal with the environment of multi-user multi-path interference. Finally, transmit diversity methods for multipath attenuation channels and multi-user transmission have also been proposed, such as B.R. Vojcic and W.M.

Jang, n Transmitter precoding in synchronous multiuser communications, 丨 IEEE Trans. On

Examples are described in Communications, vol. 46, pp. 1 346-1 355, Oct. 1998. This method uses signal processing techniques in the time domain to eliminate multi-user and multi-path interference. That is, the method uses complex inverse matrix operations to achieve the user station to obtain transmit diversity gain, but its method requires inverse matrix operations. The amount of calculation is very large, so the processing flow is complicated, and it is quite difficult to implement with VLSI technology. [Summary of the invention] The main purpose of the present invention is to provide a low-complexity calculation.

589818 V. Description of the invention (4) _ When the signal is transmitted, N pieces of data must be flat: a serial-to-parallel converter 10, and a carrier and J antennas are generated at the same time, and transmission is ordered. At this time, the signal is allocated to M to the same signal ^ at the same time, as shown in Figure 1, and each antenna is assigned to You = seven y (Pll2 transmission. Therefore, this signal can be described as a general formula Assigned to P Γ · / and hearts 1, 2,,...,). Each of these carriers can be of the same power).牿 Gong, to transmit, P 2 N / M (N and ^ 1 are 2 are orthogonal to each other will not be clear, the center frequency domain of each carrier among M carriers is received, as shown in Figure 2 The spectrum distribution is shown, and after M is allocated, it should be completed by 1FFT / fft. In the data pre-processing processor 1 丨 try to be transmitted on each carrier to the channel pre-benefit and multiply; ; n:: f 通道 The channel in the wide area is increased. Because in the sub-sleep 雔 ㈤) ~, · 7, w, the eighth is the operation of taking the conjugate complex number to use the system in the frequency link = Channel gain ^ may. 枷 = 丨, 2, ·· .Failed, first obtained 'and each antenna; = 1,2, ..., every time there is " guarantee 1 r the same. In particular, among them, the design of the Japanese Intellectual Test 1 processor "15 (Guard Interval) due to the on-chain, the channel: the two-path effect will become a flat μ in the frequency domain. In addition to the advantages, the = iI key receiver circuit further puts the user's platform rake processor; the ground platform processes it, which is the channel pre-processor 1 i. After the channel is pre-processed, the signal will be On each wave, it is transmitted to the spread-spectrum code generator. 2. The spread-spectrum code generator multiplies the signal with the spread-spectrum code and generates "吒", two of which are the P-th signal interval on the carrier. There will be hU ·, ruler and other κ code phases m 589818 V. Description of invention (5). In particular, in order to allow the same carrier to simultaneously transmit p signals ′ without causing interference and achieve high-speed downlink capability, p different, orthogonal production frequency codes are used to produce 1,2, ...,. Like Hadamard_

Walsh code, where after the spreading code, the generator 1 2 / calculate the signal heart oH • heart ~ 'Hehe' in the same carrier is the two of the keys that are simultaneously keyed to achieve multiple 'households, at this time On the same carrier, add the signal | Xinyi.W 彳 and its signal to the household to generate a signal ~. And the P signal ~ U = i, 2, "., A /) is converted from φ ί to f fast Fourier converter 13 to calculate M points, and vice versa 1,, and the Fourier converter and the signal is transmitted To the parallel-to-serial converter ^ was passed and the serial number was represented by the symbol gas. In addition, the signal will be copied ^ if interval processor 15 ′ This protected interval processor 15 is the tail of the signal, and a signal is copied to the description and protected area; 〆: the second place does not generate a signal. . In particular, a multipath interval in the channel in frequency will be achieved, which will illuminate the advantages of the signal through the upconverting channel path. Then, the base is out 'this day = the frequency is up-converted to IF / RF signal and then transmitted via the jth antenna and π. Channel ^ antennas at the same time. The base station will be different at each green end ^. The emission signal of the base station reaches the receiver through the influence of the environment, because in the time-sharing operation, the disk diameter is equal to that of the chip 1, 2, ..., * 7 antennas. Special note: On-chain and down-chain transmission 2 ρ = Communication system where the user station moves slowly. In the context of continuous transmission, the multipath attenuation value α in the time domain is the same.

$ 9 pages 589818 V. Description of Invention (6) Same. Because the receiver processes the signal at the subscriber station: OK? : Knowing that after the guard interval is removed, the frequency: The above equation is used to express the farmers' reduction m, that is, the signal below hjy-hjM ^ FFT ^ ajx α; 2 ... α 〇 ... 〇])

HI. Receiver part, U in this :: Ming MC Ds —_Α The receiver part of the downlink architecture does not: the antenna receives the incoming radio frequency (RF / IF) $ ^% 4 The device 21 generates a signal-(please refer to the fifth Figure). In addition,: =: remove: the parallel-to-parallel converter 22 generates _parallel output and output and the M signals are transmitted to the fast π :: ;; out of Mrr fast Fourier transform and 丄 = κ = is transmitted on the carrier To spread spectrum code matching filtering. / im 'μ f δί No. 1 h is multiplied with the spreading code Cp, * to generate Fan &, which equals 1Ϊ, because :: Explanation' Because there are ρ spreading codes in the same carrier, and the message is processed simultaneously ... In total, I remember Α this day β π attack flood bluff. In the first display frequency .. Code week Doudou P-ι dip W, so you can remove the signals of parallel transmission: wheel production 1, 2, ..., P. Special 4: 丨 two words 丨 "J, where hunger = 1, 2, ..., there will be a diversity gain in the output signal / Ul p 1_ 111 ~ 1 see ___ 1111 1 round _ country 1 10 Page 589818 V. Description of the invention (7) Office J 'It is because the channel pre-processing technology is designed at the transmitting end, such as two daggers = under-end. It is possible to match the diversity gain of the filter through a simple spread-spectrum code without receiving. High-end processor, 2 circuits of the user station receiver, and the signal-to-noise ratio quality of the tp signal, so it can improve the reception ^ c ”to have such functions as changing the modulation mode, saving power and the base station. What is the best σ number for the use of elastic systems such as area expansion? From the exhibition: the T wave filter 24 receives the signal, and the s policy 25 will decide whether 仏 η, * 立 丄 υ 6 6 之 的 部 部 is greater than or small and produces an experimental judgment fj otsK Erguang 、 / 繁: 9 ::: 疋 《π 'If the tone of the signal is changed to QPSK, the decision 25 will determine whether the part of the signal ^ 乂 is greater than or less than 0, and a ^ judgment is made.彳 ―. In this QPSK example, the resulting real (p-') M + m is in the signal. Then, as shown in Figure 4 *, this: is a complex serial-to-serial converter%, and the generated data is transmitted to and merged. The experimental data of the present invention is mainly to verify the inventor m :. First of all, use computer simulation software Matlab to verify it. When establishing the simulation environment, it is assumed that there will be two antennas for each antenna. The two paths under construction are all Rayleigh attenuation (Rayleigh f two: they are transmitted at the rate of "_bps" and are divided into four antennas (j = two and = Λ frequency codes). The generator (p = 4) transmits data at the same time. The length of the intermediate IFFT / FFT is 16 and the length of the guard interval is-^

The receiver only needs 4 spread-spectrum code matchers for each carrier. Strategy ', J

$ 11 pages 589818 V. Description of the invention (8) It can detect the 4.0 96Mbps data of the original high-speed transmission. However, it can be seen from Figure 6 of the simulation results that when the number of antennas is increased, the error rate (BER) is significantly reduced, that is, the user station receiver receives transmit diversity = gain, which improves the reception quality. Moreover, it can be known from the experiment that the experimental data obtained when f is an antenna is in agreement with the theoretical formula (the result of the difference). Finally, the emission point is obtained from the simulation result; = in the environment of multipath attenuation 'And the receiver can obtain. Set the efficiency, and can detect high-speed, high-quality data to limit the work Γ month: the embodiment is disclosed as above, but it is not the spirit and range β, A = the person who is learning this skill, Departure from the application attached to the present invention; 2 actions and retouching, the scope of protection of the present invention: buried mode ίΐί is used by a user, but = the best implementation: use detection. Inventions to change.

Page 12 589818 Brief description of the drawings [Simplified description of the drawings] The first diagram is a schematic diagram of the base / transmitter architecture of the present invention. The second figure is a spectrum distribution diagram of M carriers according to the present invention. The third figure is a schematic diagram of the replication signal of the protection interval processor of the present invention. The fourth figure is a schematic diagram of the receiver station mechanism of the present invention. The fifth diagram is a schematic diagram of removing signals by the guard interval remover of the present invention. The sixth diagram is the simulation result of the present invention. [Illustration of drawing number] 1 0, serial-to-parallel converter 11, channel pre-processor 1 2, spread-spectrum code generator 1, 3, inverse fast Fourier converter 1, 4, parallel-to-serial converter 1, 5, protection interval Processor 16, up-converter 2 0, down-converter 2 1. guard interval remover 2 2. serial-to-parallel converter 23, fast Fourier converter 2 4. spread-spectrum code matching consideration 25, decision-maker 2 6.Parallel to serial converter

Page 13

Claims (1)

  1. A method for transmitting and distributing a duplex wide-type connection system. Battle-wave direct sequence divider, spread-spectrum code generator /, including space-frequency communication i and protection interval processor. Inverse speed Fourier transform The FFT is matched with the spreading code, which enables the user station to be fast. The receiver of the filter is connected to the transmission system of the system. The direct carrier sequence in the transmit frequency domain of each antenna base station is pre-processed. J is obtained: the channel is increased; , Use multiple spread-spectrum code generators to build to the purpose of down-chain; use anti-fast, flat, laugh, Gan Yue catch Fourier converters, achieve multi-carrier signal defeat this orthogonal non-overlapping interference; different sky green ,,,, ^,,,, Find the same signal, but different antennas have the function of increasing gain, ^ ^ # antennas on each carrier at the same time as the function of the router · f company transmits multiple signals at the same time and different signals with the same load ,, I Μ々β ^ built to the purpose of the next key. A transmission and distribution method for a time-division duplex wideband multi-carrier direct-sequence f-system. At the receiving end of a user station, each carrier has different spread-spectrum matched filters. 'Fin' 'Each signal has diversity gain exhaustive multiple advance preprocessor (IFFT) Fourier to 7 receivable code multiple advance system includes:' Applies to channel benefits when transmitting multiple signals in parallel and transmitting different channels in advance The transmission of non-code multiple inputs includes: time-decision output; 589818 VI. The same multiple spread spectrum code matching filters are used on different carriers with different patent application scopes, and multiple signals different from other carriers can be determined at the same time; All the coexistence of Judedong 5 on all carriers achieve the purpose of data output through the parallel to serial converter.
    Page 15
TW91134104A 2002-11-22 2002-11-22 Method of transmit diversity using TDD wideband multi-carrier DS-CDMA system TW589818B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
TW91134104A TW589818B (en) 2002-11-22 2002-11-22 Method of transmit diversity using TDD wideband multi-carrier DS-CDMA system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
TW91134104A TW589818B (en) 2002-11-22 2002-11-22 Method of transmit diversity using TDD wideband multi-carrier DS-CDMA system

Publications (2)

Publication Number Publication Date
TW200409480A TW200409480A (en) 2004-06-01
TW589818B true TW589818B (en) 2004-06-01

Family

ID=34058009

Family Applications (1)

Application Number Title Priority Date Filing Date
TW91134104A TW589818B (en) 2002-11-22 2002-11-22 Method of transmit diversity using TDD wideband multi-carrier DS-CDMA system

Country Status (1)

Country Link
TW (1) TW589818B (en)

Cited By (27)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7839829B2 (en) 2006-02-07 2010-11-23 Lg Electronics, Inc. Method for transmitting response information in mobile communications system
US7869396B2 (en) 2006-01-05 2011-01-11 Lg Electronics, Inc. Data transmission method and data re-transmission method
US7881390B2 (en) 2004-12-01 2011-02-01 Intel Corporation Increased discrete point processing in an OFDM communication system
US7881724B2 (en) 2006-01-05 2011-02-01 Lg Electronics Inc. Allocating radio resources in mobile communications system
US7885349B2 (en) 2007-02-14 2011-02-08 Lg Electronics Inc. Data transmitting and receiving method using phase shift based precoding and transceiver supporting the same
US7953169B2 (en) 2007-06-13 2011-05-31 Lg Electronics Inc. Transmitting spread signal in communication system
US7961808B2 (en) 2007-09-19 2011-06-14 Lg Electronics Inc. Data transmitting and receiving method using phase shift based precoding and transceiver supporting the same
US8000401B2 (en) 2006-05-26 2011-08-16 Lg Electronics Inc. Signal generation using phase-shift based pre-coding
US8068473B2 (en) 2006-02-07 2011-11-29 Lg Electronics Inc. Method for operating enhanced RLC entity and RNC entity for WCDMA and system thereof
US8072938B2 (en) 2006-01-05 2011-12-06 Lg Electronics, Inc. Method for handover in mobile communication system
US8112091B2 (en) 2006-01-05 2012-02-07 Lg Electronics Inc. Allocating radio resources in mobile communications system
US8135420B2 (en) 2006-01-05 2012-03-13 Lg Electronics Inc. Method of transmitting/receiving a paging message in a wireless communication system
US8189537B2 (en) 2006-06-21 2012-05-29 Lg Electronics Inc. Method for reconfiguring radio link in wireless communication system
US8234534B2 (en) 2006-06-21 2012-07-31 Lg Electronics Inc. Method of supporting data retransmission in a mobile communication system
US8243665B2 (en) 2006-02-07 2012-08-14 Lg Electronics Inc. Method for selection and signaling of downlink and uplink bandwidth in wireless networks
US8248924B2 (en) 2006-06-21 2012-08-21 Lg Electronics Inc. Uplink access method of mobile communication system
US8284849B2 (en) 2006-05-26 2012-10-09 Lg Electronics Inc. Phase shift based precoding method and transceiver for supporting the same
US8340026B2 (en) 2006-01-05 2012-12-25 Lg Electronics Inc. Transmitting data in a mobile communication system
US8396020B2 (en) 2006-01-05 2013-03-12 Lg Electronics Inc. Point-to-multipoint service communication
US8428086B2 (en) 2006-01-05 2013-04-23 Lg Electronics Inc. Transmitting data in a mobile communication system
US8493854B2 (en) 2006-02-07 2013-07-23 Lg Electronics Inc. Method for avoiding collision using identifier in mobile network
US8570956B2 (en) 2006-06-21 2013-10-29 Lg Electronics Inc. Method of communicating data in a wireless mobile communications system using message separation and mobile terminal for use with the same
US8638707B2 (en) 2006-06-21 2014-01-28 Lg Electronics Inc. Method for supporting quality of multimedia broadcast multicast service (MBMS) in mobile communications system and terminal thereof
US8644250B2 (en) 2006-01-05 2014-02-04 Lg Electronics Inc. Maintaining communication between mobile terminal and network in mobile communication system
US8750217B2 (en) 2006-01-05 2014-06-10 Lg Electronics Inc. Method for scheduling radio resources in mobile communication system
US8971288B2 (en) 2006-03-22 2015-03-03 Lg Electronics Inc. Method of supporting handover in a wireless communication system
US9456455B2 (en) 2006-01-05 2016-09-27 Lg Electronics Inc. Method of transmitting feedback information in a wireless communication system

Cited By (62)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7881390B2 (en) 2004-12-01 2011-02-01 Intel Corporation Increased discrete point processing in an OFDM communication system
US9036596B2 (en) 2006-01-05 2015-05-19 Lg Electronics Inc. Transmitting data in a mobile communication system
US8369865B2 (en) 2006-01-05 2013-02-05 Lg Electronics Inc. Data transmission method and data re-transmission method
US7869396B2 (en) 2006-01-05 2011-01-11 Lg Electronics, Inc. Data transmission method and data re-transmission method
US8396020B2 (en) 2006-01-05 2013-03-12 Lg Electronics Inc. Point-to-multipoint service communication
US7881724B2 (en) 2006-01-05 2011-02-01 Lg Electronics Inc. Allocating radio resources in mobile communications system
US9955507B2 (en) 2006-01-05 2018-04-24 Lg Electronics Inc. Maintaining communication between mobile terminal and network in mobile communication system
US8072938B2 (en) 2006-01-05 2011-12-06 Lg Electronics, Inc. Method for handover in mobile communication system
USRE43949E1 (en) 2006-01-05 2013-01-29 Lg Electronics Inc. Allocating radio resources in mobile communications system
US8340026B2 (en) 2006-01-05 2012-12-25 Lg Electronics Inc. Transmitting data in a mobile communication system
US9456455B2 (en) 2006-01-05 2016-09-27 Lg Electronics Inc. Method of transmitting feedback information in a wireless communication system
US9397791B2 (en) 2006-01-05 2016-07-19 Lg Electronics Inc. Transmitting data in a mobile communication system
US9253801B2 (en) 2006-01-05 2016-02-02 Lg Electronics Inc. Maintaining communication between mobile terminal and network in mobile communication system
US8644250B2 (en) 2006-01-05 2014-02-04 Lg Electronics Inc. Maintaining communication between mobile terminal and network in mobile communication system
US8750217B2 (en) 2006-01-05 2014-06-10 Lg Electronics Inc. Method for scheduling radio resources in mobile communication system
US8244269B2 (en) 2006-01-05 2012-08-14 Lg Electronics Inc. Allocating radio resources in mobile communications system
US8428086B2 (en) 2006-01-05 2013-04-23 Lg Electronics Inc. Transmitting data in a mobile communication system
US8112091B2 (en) 2006-01-05 2012-02-07 Lg Electronics Inc. Allocating radio resources in mobile communications system
US8135420B2 (en) 2006-01-05 2012-03-13 Lg Electronics Inc. Method of transmitting/receiving a paging message in a wireless communication system
US8165596B2 (en) 2006-01-05 2012-04-24 Lg Electronics Inc. Data transmission method and data re-transmission method
US8867449B2 (en) 2006-01-05 2014-10-21 Lg Electronics Inc. Transmitting data in a mobile communication system
US8437335B2 (en) 2006-02-07 2013-05-07 Lg Electronics Inc. Method for transmitting response information in mobile communications system
US8175052B2 (en) 2006-02-07 2012-05-08 Lg Electronics Inc. Method for transmitting response information in mobile communications system
US8223713B2 (en) 2006-02-07 2012-07-17 Lg Electronics Inc. Method for transmitting response information in mobile communications system
US8085738B2 (en) 2006-02-07 2011-12-27 Lg Electronics Inc. Preamble retransmission method in mobile communications system
US8238371B2 (en) 2006-02-07 2012-08-07 Lg Electronics Inc. Method for operating enhanced RLC entity and RNC entity for WCDMA and system thereof
US8243665B2 (en) 2006-02-07 2012-08-14 Lg Electronics Inc. Method for selection and signaling of downlink and uplink bandwidth in wireless networks
US8081660B2 (en) 2006-02-07 2011-12-20 Lg Electronics, Inc. Method for requesting radio resource in mobile communications system
US8068473B2 (en) 2006-02-07 2011-11-29 Lg Electronics Inc. Method for operating enhanced RLC entity and RNC entity for WCDMA and system thereof
US8493854B2 (en) 2006-02-07 2013-07-23 Lg Electronics Inc. Method for avoiding collision using identifier in mobile network
US8451821B2 (en) 2006-02-07 2013-05-28 Lg Electronics Inc. Method for transmitting response information in mobile communications system
US7839829B2 (en) 2006-02-07 2010-11-23 Lg Electronics, Inc. Method for transmitting response information in mobile communications system
US9462576B2 (en) 2006-02-07 2016-10-04 Lg Electronics Inc. Method for transmitting response information in mobile communications system
US9706580B2 (en) 2006-02-07 2017-07-11 Lg Electronics Inc. Method for transmitting response information in mobile communications system
US7848308B2 (en) 2006-02-07 2010-12-07 Lg Electronics, Inc. Method for transmitting response information in mobile communications system
US7843877B2 (en) 2006-02-07 2010-11-30 Lg Electronics, Inc. Method for transmitting response information in mobile communications system
US8406190B2 (en) 2006-02-07 2013-03-26 Lg Electronics Inc. Method for transmitting response information in mobile communications system
US10045381B2 (en) 2006-02-07 2018-08-07 Lg Electronics Inc. Method for transmitting response information in mobile communications system
US8971288B2 (en) 2006-03-22 2015-03-03 Lg Electronics Inc. Method of supporting handover in a wireless communication system
US8331464B2 (en) 2006-05-26 2012-12-11 Lg Electronics Inc. Phase shift based precoding method and transceiver for supporting the same
US8284849B2 (en) 2006-05-26 2012-10-09 Lg Electronics Inc. Phase shift based precoding method and transceiver for supporting the same
US8000401B2 (en) 2006-05-26 2011-08-16 Lg Electronics Inc. Signal generation using phase-shift based pre-coding
US8036286B2 (en) 2006-05-26 2011-10-11 Lg Electronics, Inc. Signal generation using phase-shift based pre-coding
US8429478B2 (en) 2006-06-21 2013-04-23 Lg Electronics Inc. Method of supporting data retransmission in a mobile communication system
US8570956B2 (en) 2006-06-21 2013-10-29 Lg Electronics Inc. Method of communicating data in a wireless mobile communications system using message separation and mobile terminal for use with the same
US8638707B2 (en) 2006-06-21 2014-01-28 Lg Electronics Inc. Method for supporting quality of multimedia broadcast multicast service (MBMS) in mobile communications system and terminal thereof
US8248924B2 (en) 2006-06-21 2012-08-21 Lg Electronics Inc. Uplink access method of mobile communication system
US9220093B2 (en) 2006-06-21 2015-12-22 Lg Electronics Inc. Method of supporting data retransmission in a mobile communication system
US8189537B2 (en) 2006-06-21 2012-05-29 Lg Electronics Inc. Method for reconfiguring radio link in wireless communication system
TWI424709B (en) * 2006-06-21 2014-01-21 Lg Electronics Inc Uplink access method of mobile communication system
US8234534B2 (en) 2006-06-21 2012-07-31 Lg Electronics Inc. Method of supporting data retransmission in a mobile communication system
US7899132B2 (en) 2007-02-14 2011-03-01 Lg Electronics Inc. Data transmitting and receiving method using phase shift based precoding and transceiver supporting the same
US8284865B2 (en) 2007-02-14 2012-10-09 Lg Electronics Inc. Data transmitting and receiving method using phase shift based precoding and transceiver supporting the same
US7885349B2 (en) 2007-02-14 2011-02-08 Lg Electronics Inc. Data transmitting and receiving method using phase shift based precoding and transceiver supporting the same
US8774299B2 (en) 2007-06-13 2014-07-08 Lg Electronics Inc. Transmitting spread signal in communication system
US8774297B2 (en) 2007-06-13 2014-07-08 Lg Electronics Inc. Transmitting spread signal in communication system
US8792570B2 (en) 2007-06-13 2014-07-29 Lg Electronics Inc. Transmitting spread signal in communication system
US7953169B2 (en) 2007-06-13 2011-05-31 Lg Electronics Inc. Transmitting spread signal in communication system
US8208576B2 (en) 2007-09-19 2012-06-26 Lg Electronics Inc. Data transmitting and receiving method using phase shift based precoding and transceiver supporting the same
US7970074B2 (en) 2007-09-19 2011-06-28 Lg Electronics Inc. Data transmitting and receiving method using phase shift based precoding and transceiver supporting the same
US7961808B2 (en) 2007-09-19 2011-06-14 Lg Electronics Inc. Data transmitting and receiving method using phase shift based precoding and transceiver supporting the same
US8670500B2 (en) 2007-09-19 2014-03-11 Lg Electronics Inc. Data transmitting and receiving method using phase shift based precoding and transceiver supporting the same

Also Published As

Publication number Publication date
TW200409480A (en) 2004-06-01

Similar Documents

Publication Publication Date Title
Yang et al. Performance of generalized multicarrier DS-CDMA over Nakagami-m fading channels
CN100581076C (en) Transmit diversity wireless communication method and system
JP5571131B2 (en) Code division multiplexing in a single carrier frequency division multiple access system.
US6377632B1 (en) Wireless communication system and method using stochastic space-time/frequency division multiplexing
TWI242945B (en) Mobile station, base station, and program for and method of wireless transmission
CA2109947C (en) Rake receiver with selective ray combining
JP4194038B2 (en) Adaptive signal processing method in MIMO system
CN1063890C (en) Method and system for demodulation of downlink CDMA signals
DE19983621B4 (en) Orthogonal transmission / reception diversity method and associated device
RU2192094C1 (en) Method for coherent staggered signal transmission
US6512737B1 (en) Stacked carrier discrete multiple tone communication system
US5521937A (en) Multicarrier direct sequence spread system and method
ES2345279T3 (en) Subscriber and procedure unit for use in a wireless communication system.
JP4046456B2 (en) Method and apparatus for providing downlink diversity for CDMA communication
CN1237746C (en) Stacked-carrier discrete multiple tone communication technology
JP2010213288A (en) Multi-antenna transmission for spatial division multiple access
EP1021882B1 (en) Device and method for cancelling code interference in a cdma communication system
KR100432073B1 (en) Multi-user spread spectrum communication system
CN1256815C (en) Apparatus and method for transmission diversity using more than two antennas
JP5248535B2 (en) Method and apparatus for improving bandwidth efficiency in multiple input-multiple output channels
EP1172944B1 (en) Wireless transmitter and receiver
JP2005533460A (en) Scaling using gain factors for data detection for wireless code division multiple access communication systems
TWI294745B (en) Cellular system with link diversity feedback
US20050220200A1 (en) Bandwidth and power efficient multicarrier multiple access
US7656936B2 (en) Method and system for interference reduction in a wireless communication network using a joint detector

Legal Events

Date Code Title Description
GD4A Issue of patent certificate for granted invention patent