[go: up one dir, main page]

Chari, 2003 - Google Patents

Adaptive subcarrier selection for mitigating Bluetooth interference in OFDM-based wireless LANs operating at 2.4 GHz

Chari, 2003

Document ID
5562357070326668284
Author
Chari S
Publication year
Publication venue
Digital Wireless Communications V

External Links

Snippet

IEEE 802.11 g WLANs operating at 2.4 GHz face interference from Bluetooth which also uses the same frequency. IEEE 802.11 g is an orthogonal frequency divison multiplexing (OFDM) based WLAN standard. Adaptive subcarrier selection (ASuS) involves using …
Continue reading at www.spiedigitallibrary.org (other versions)

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/0001—Arrangements for dividing the transmission path
    • H04L5/0003—Two-dimensional division
    • H04L5/0005—Time-frequency
    • H04L5/0007—Time-frequency the frequencies being orthogonal, e.g. OFDM(A), DMT
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/26—Systems using multi-frequency codes
    • H04L27/2601—Multicarrier modulation systems
    • H04L27/2602—Signal structure
    • H04L27/2608—Allocation of payload
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/004—Arrangements for detecting or preventing errors in the information received by using forward error control
    • H04L1/0056—Systems characterized by the type of code used
    • H04L1/0071—Use of interleaving
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/26—Systems using multi-frequency codes
    • H04L27/2601—Multicarrier modulation systems
    • H04L27/2602—Signal structure
    • H04L27/2605—Symbol extensions
    • H04L27/2607—Cyclic extensions
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/26—Systems using multi-frequency codes
    • H04L27/2601—Multicarrier modulation systems
    • H04L27/2602—Signal structure
    • H04L27/261—Details of reference signals
    • H04L27/2613—Structure of the reference signals per se
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/26—Systems using multi-frequency codes
    • H04L27/2601—Multicarrier modulation systems
    • H04L27/2647—Arrangements specific to the receiver
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/004—Arrangements for detecting or preventing errors in the information received by using forward error control
    • H04L1/0056—Systems characterized by the type of code used
    • H04L1/0059—Convolutional codes
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0044—Arrangements for allocating sub-channels of the transmission path allocation of payload
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L25/00—Baseband systems
    • H04L25/02—Details ; Arrangements for supplying electrical power along data transmission lines
    • H04L25/0202—Channel estimation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L25/00—Baseband systems
    • H04L25/02—Details ; Arrangements for supplying electrical power along data transmission lines
    • H04L25/03—Shaping networks in transmitter or receiver, e.g. adaptive shaping networks ; Receiver end arrangements for processing baseband signals
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
    • H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/02—Channels characterised by the type of signal
    • H04L5/023—Multiplexing of multicarrier modulation signals
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATIONS NETWORKS
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION

Similar Documents

Publication Publication Date Title
US9197374B2 (en) Repetition coding for a wireless system
US6904550B2 (en) Velocity enhancement for OFDM systems
KR101298141B1 (en) Method and apparatus for facilitating concatenated codes for beacon channels
KR101304833B1 (en) Apparatus and method for mapping/demapping according to rs power assignment in mobile communication system
JP4000057B2 (en) OFDM communication device
KR100520159B1 (en) Apparatus and method for interference cancellation of ofdm system using multiple antenna
RU2385535C2 (en) Transmission of data with efficient formats of time interval and unit in system of wireless communication
CA2942545C (en) Mimo slotted aloha (msa) system
US7355960B2 (en) Channel estimation apparatus and method for adaptive channel allocation in an orthogonal frequency division multiple access system
US20050099939A1 (en) Apparatus and method for transmitting/receiving pilot signals in an OFDM communication system
US20140334421A1 (en) Joint bit loading and symbol rotation scheme for multi-carrier systems in siso and mimo links
US7869341B2 (en) Method and apparatus for positioning pilot in an OFDMA mobile communication system
KR20050060631A (en) An apparatus for ofdma transmission and reception for the coherent detection in the uplink, and a method thereof
KR20090101460A (en) Single carrier modulation system with pilots at the beginning of each data block to improve frequency/phase error tracking
US20040258014A1 (en) Apparatus and method for assigning a dedicated pilot channel for identification of a base station in an OFDM communication system
EP3759881B1 (en) Application of asynchronous coded multiple access in a system employing orthogonal frequency division multiplexing
US20070248174A1 (en) Method and System for Implementing Multiple-In-Multiple-Out Ofdm Wireless Local Area Network
Chaturvedi et al. Performance Analysis for Different Interleavers in Various Modulation Schemes with OFDM over an AWGN Channel
JP5010329B2 (en) Error vector evaluation method, adaptive subcarrier modulation method, and frequency division communication method
Wu et al. Analysis of intercarrier and interblock interferences in wireless OFDM systems
Chari Adaptive subcarrier selection for mitigating Bluetooth interference in OFDM-based wireless LANs operating at 2.4 GHz
KR20040094364A (en) Increasing effective number of data tones in a multi-tone communication system
KR20070058271A (en) Method and apparatus for removing adjacent cell interference signal in receiver in orthogonal frequency division multiple access system
KR20040028226A (en) TDS-OFDM transmission system add pilot signal in frequence domain and a method proessing OFDM signal thereof
GB2434064A (en) Assigning time-frequency codes in MB-OFDM on the basis of channel information and data rate