US 8,953,641 B2
Methods and apparatus for multi-carrier communications with variable channel bandwidthGeneral
US 8,953,641 B2
Methods and apparatus for multi-carrier communications with variable channel bandwidth
Tech Center:
2400 Networking, Multiplexing, Cable, and Security
Examiner:
Khoa Huynh
Art Unit:
2462 Multiplex and VoIP
Inventors:
Xiaodong Li; Titus Lo; Kemin Li; Haiming Huang
Assignee:
Priority:
01/29/04
Filed:
08/27/10
Granted:
02/10/15
Expiration:
12/03/25
Abstract
Methods and apparatus for multi-carrier communication with variable channel bandwidth are disclosed, where the time frame structure and the OFDM symbol structure are invariant and the frequency-domain signal structure is flexible. In one embodiment, a mobile station, upon entering a geographic area, uses a core-band to initiate communication and obtain essential information and subsequently switches to full operating bandwidth of the area for the remainder of the communication. If the mobile station operates in a wide range of bandwidths, the mobile station divides the full range into sub-ranges and adjusts its sampling frequency and its FFT size in each sub-range.
Cooperative Patent Classification (CPC)
H04H04W72/30H04L27/2613H04W