Method and apparatus for transmission and reception of data

Details Method and apparatus for transmission and reception of data Method and apparatus for transmission and reception of data

2006-12-05

2006-12-05

Patel, Ajit (Department: 2616)

Multiplex communications

Generalized orthogonal or special mathematical techniques

C370S204000, C370S206000, C370S208000, C370S343000, C375S298000

Reexamination Certificate

active

07145862

ABSTRACT:
To address the need for reducing pilot overhead, a method and apparatus for transmitting and receiving data is provided herein. A communication system having a transmitter (100) that utilizes adaptive modulation and coding (AMC) and utilizes lower-order modulated (e.g., QPSK) data as a substitute for pilot symbols during transmission. Data intended for a user utilizing a lower order modulation can be reliably detected, and if properly processed, used as pilots for a user that is trying to receive a higher order modulation (e.g., 64-QAM). Because lower order modulated data is utilized for pilots, fewer overall pilots are used. This greatly reduces pilot overhead, increasing data throughput.

REFERENCES:
patent: 5530920 (1996-06-01), Takeda
patent: 5533004 (1996-07-01), Jasper et al.
patent: 5537410 (1996-07-01), Li
patent: 5771226 (1998-06-01), Kaku
patent: 5784683 (1998-07-01), Sistanizadeh et al.
patent: 6192070 (2001-02-01), Poon et al.
patent: 6356555 (2002-03-01), Rakib et al.
patent: 2002/0150037 (2002-10-01), Bao et al.
patent: 2002/0167923 (2002-11-01), Sendonaris et al.
patent: 1 154 602 (2001-11-01), None
“Iterative channel estimation and decoding for a turbo coded OFDM system via the EM algorithm”, Zhuang, X.J.; Vook, F.W., Acoustics, Speech, and Signal Processing, 2002 IEEE International Conference.
“Pilot-symbol-aided channel estimation for OFDM in wireless systems”, Ye Li, Vehicular Technology, IEEE Transactions, Jul. 2000.
“Linear two dimensional pilot assisted channel estimation for OFDM systems”, Said, F.; Aghvami, H. Telecommunications, 1998. 6th IEEE Conference.

Affiliated with

Also associated with

Rating

Method and apparatus for transmission and reception of data does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Method and apparatus for transmission and reception of data, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and apparatus for transmission and reception of data will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3704983