Pilot signals for synchronization and/or channel estimation

• US 7,496,132 B2
• Filed: 04/07/2005
• Issued: 02/24/2009
• Est. Priority Date: 03/15/1999
• Status: Expired due to Term

• Current Assignee: 3G Licensing S.A. (Fineur International S.A.)
• Original Assignee: KG Electronics Incorporated
• Inventors: Song, Young-Joon
• Primary Examiner(s): Pathak; Sudhanshu C
• Application Number:
  US11/100,594
• Publication Number:
  US 20060002453A1
• Time in Patent Office: 1,419 Days
• Field of Search: 370/342, 370/209, 370/509, 370/335, 375/343, 375/149
• US Class Current: 375/149
• CPC Class Codes: H04B 1/7075 with code phase acquisition
• CPC Class Codes: H04B 1/70755 Setting of lock conditions, e.g. threshold
• CPC Class Codes: H04B 1/708 Parallel implementation
• CPC Class Codes: H04B 1/709 Correlator structure
• CPC Class Codes: H04B 1/7095 Sliding correlator type
• CPC Class Codes: H04B 1/7115 Constructive combining of multi-path signals, i.e. RAKE receivers
• CPC Class Codes: H04B 2201/70701 featuring pilot assisted reception
• CPC Class Codes: H04J 13/10 Code generation

Abstract

The frame words of the embodiments are suitable for frame synchronization and/or channel estimation. By adding the autocorrelation and/or cross-correlation functions of frame words, double maximum values equal in magnitude and opposite polarity at zero and middle shifts are obtained. This property can be used to slot-by-slot, double-check frame synchronization timing, single frame synchronization and/or channel estimation and allows reduction of the synchronization search time. Further, the present invention allows a simpler construction of a correlator circuit for a receiver. A frame synchronization apparatus and method using an optimal pilot pattern is used in a wide band code division multiple Access (W- CDMA) next generation mobile communication system.

Claims

1. A method of transmitting pilot patterns for at least one of frame synchronization or channel estimation for a receiving side, the method comprising:

providing a radio frame which comprises 15 slots, each slot including a plurality of pilot bits;

inserting a first code sequence and a second code sequence into the radio frame, wherein the first code sequence is “

100011110101100”

, each bit of the first code sequence located at a pilot bit position of each slot, and wherein the second code sequence is “

101001101110000”

, each bit of the second code sequence located at another bit position of each slot; and

transmitting the radio frame on a physical control channel to the receiving side.

2. The method of claim 1, wherein each slot further includes a plurality of TFCI bits indicating a transport format combination indicator (TFCI).

3. A method of transmitting pilot patterns for at least one of frame synchronization or channel estimation for a receiving side, the method comprising:

providing a radio frame which comprises 15 slots, each slot including a plurality of pilot bits;

inserting a first code sequence and a second code sequence into the radio frame, wherein the first code sequence is “

110001001101011”

, each bit of the first code sequence located at a pilot bit position of each slot, and wherein the second code sequence is “

001010000111011”

, each bit of the second code sequence located at another bit position of each slot; and

transmitting the radio frame on a physical control channel to the receiving side.

4. The method of claim 3, wherein each slot further includes a plurality of TFCI bits indicating a transport format combination indicator (TFCI).