Method and apparatus for generating/transmitting a frame for wireless communication, and synchronization estimation method for wireless communication

• US 10,277,443 B2
• Filed: 08/23/2010
• Issued: 04/30/2019
• Est. Priority Date: 08/25/2009
• Status: Active Grant

• Current Assignee: Electronics and Telecommunications Research Institute
• Original Assignee: Electronics and Telecommunications Research Institute
• Inventors: Chang, Kapseok, Lee, Wooyong, Chung, Hyun-Kyu
• Primary Examiner(s): Liu, Shuwang
• Assistant Examiner(s): McKie, Gina
• Application Number:
  US13/392,468
• Publication Number:
  US 20120219077A1
• Time in Patent Office: 3,172 Days
• Field of Search: None
• CPC Class Codes: H04L 27/261 Details of reference signals
• CPC Class Codes: H04L 27/2613 Structure of the reference signals
• CPC Class Codes: H04L 27/2692 with preamble design, i.e. with negotiation of the synchronisation sequence with transmitter or sequence linked to the algorithm used at the receiver
• CPC Class Codes: H04W 56/0085 detecting a given structure in the signal
• CPC Class Codes: H04W 72/04 Wireless resource allocation
• CPC Class Codes: H04W 84/12 WLAN [Wireless Local Area Networks]

Abstract

Disclosed is a technique related to a method and apparatus for generating a preamble and a data frame for wireless communication, and to a synchronization estimation method using the preamble. According to the technique, a method for generating a frame for wireless communication is disclosed, wherein the method comprises: a step of generating a modified sequence using a first base sequence for synchronization estimation; and a step of allocating the first base sequence and the modified sequence to the frequency domain of a first timeslot to generate a preamble. The modified sequence includes a complex conjugated sequence of the first base sequence or a sequence having a code different from that of the first base sequence.

Claims

1. A computer-executable method of generating a frame for wireless communication, the method comprising:

generating, by a processor, a modified sequence using a base sequence, the modified sequence corresponding to a complex conjugate of the base sequence, each of the base sequence and the modified sequence including a plurality of elements; and

generating a preamble, by the processor, by allocating the plurality of elements of the base sequence and the plurality of elements of the modified sequence into a sub-carrier,

wherein the base sequence and the modified sequence are non-overlapped with each other in a frequency domain of the sub-carrier,

wherein the base sequence is allocated to a half portion of the frequency domain of the sub-carrier, and the modified sequence is allocated to a remaining half portion of the frequency domain of the sub-carrier,

wherein the modified sequence is allocated to an upper portion of the frequency domain in the sub-carrier than a portion allocated to the base sequence in the frequency domain in a same time interval for the sub-carrier,

wherein the base sequence and the modified sequence include a plurality of symbols mapping complex coordinates,

wherein the base sequence is in a complex form, and the modified sequence is the complex conjugate of the base sequence, and

wherein the preamble includes a repetition sequence having a predetermined size for each sample to perform automatic gain control or signal detection.

2. An apparatus for generating a frame for wireless communication, the apparatus comprising:

a sequence generator to generate a modified sequence using a base sequence, the modified sequence corresponding to a complex conjugate of the base sequence; and

a preamble generator to sequentially allocate a plurality of elements of the base sequence and a plurality of elements of the modified sequence to a sub-carrier, and to generate a preamble by assigning the base sequence and the modified sequence to a frequency domain of a same time interval, wherein the base sequence and the modified sequence are non-overlapped with each other in the frequency domain,

wherein the base sequence is allocated to a half portion of the frequency domain of the sub-carrier, and the modified sequence is allocated to a remaining half portion of the frequency domain of the sub-carrier, and

wherein the modified sequence is allocated to an upper portion of the frequency domain in the sub-carrier than a portion allocated to the base sequence in the frequency domain of the same time interval for the sub-carrier,

wherein the base sequence and the modified sequence include a plurality of symbols mapping complex coordinates,

wherein the base sequence is in a complex form, and the modified sequence is the complex conjugate of the base sequence, and

wherein the preamble includes a repetition sequence having a predetermined size for each sample to perform automatic gain control or signal detection.

3. A computer-executable method of generating a frame for wireless communication, the method comprising:

generating, by a processor, a modified sequence using a base sequence, the modified sequence corresponding to a complex conjugate of the base sequence; and

generating a preamble, by the processor, by sequentially allocating a plurality of elements of the base sequence and a plurality of elements of the modified sequence to a sub-carrier,

wherein the base sequence and the modified sequence are non-overlapped with each other in the frequency domain,

wherein the base sequence is allocated to a half portion of the frequency domain of the sub-carrier, and the modified sequence is allocated to a remaining half portion of the frequency domain of the sub-carrier, and

wherein the modified sequence is allocated to an upper portion of the frequency domain in the sub-carrier than a portion allocated to the base sequence in the frequency domain in a same time interval for the sub-carrier,

wherein the base sequence and the modified sequence include a plurality of symbols mapping complex coordinates,

wherein the base sequence is in a complex form, and the modified sequence is the complex conjugate of the base sequence, and

wherein the preamble includes a repetition sequence having a predetermined size for each sample to perform automatic gain control to signal detection.

4. A computer-executable method of generating a frame for wireless communication, the method comprising:

generating, by a processor, a modified sequence using a base sequence, the modified sequence corresponding to a complex conjugate of the base sequence, each of the base sequence and the modified sequence including a plurality of elements; and

generating a preamble, by the processor, by sequentially allocating the plurality of elements of the base sequence and the plurality of elements of the modified sequence into a sub-carrier,

wherein the base sequence is allocated to a half portion of a frequency domain of the sub-carrier, and the modified sequence is allocated to a remaining half portion of the frequency domain of the sub-carrier, and

wherein the modified sequence is allocated to an upper portion of the frequency domain in the sub-carrier than a portion allocated to the base sequence in the frequency domain in a same time interval for the sub-carrier,

wherein the base sequence and the modified sequence include a plurality of symbols mapping complex coordinates,

wherein the base sequence is in a complex form, and the modified sequence is the complex conjugate of the base sequence, and

wherein the preamble includes a repetition sequence having a predetermined size for each sample to perform automatic gain control or signal detection.