Method for transmitting UWB pulse sequences in a cost-efficient manner

• US 20060198425A1
• Filed: 03/03/2006
• Published: 09/07/2006
• Est. Priority Date: 03/07/2005
• Status: Active Grant

• Current Assignee: Mitsubishi Denki Kabushiki Kaisha (Mitsubishi Electric Corporation)
• Original Assignee: Mitsubishi Denki Kabushiki Kaisha (Mitsubishi Electric Corporation)
• Inventors: Froc, Gwillerm
• Granted Patent: US 7,933,317 B2
• Time in Patent Office: Days
• US Class Current: 375/130
• CPC Class Codes: H04B 1/71632 Signal aspects H04B1/7172 and H04B1/7176 take precedence
• CPC Class Codes: H04B 1/71635 Transmitter aspects H04B1/7174 takes precedence
• CPC Class Codes: H04B 1/7183 Synchronisation

Abstract

The present invention relates to a method for transmitting data in the form of at least one modulated reference pulse sequence included in a transmitted signal Tsg. The method according to the invention includes at least one signal transmission step in the course of which the number of pulses included in said reference pulse sequence is tuned, preferably with respect to ongoing communication conditions. The method according to the invention enables to optimize the processing time and power needed for performing the detection of a reference sequence at the receiver end.

Claims

1. ) A method for transmitting data in a telecommunication system including at least one transmitter and one receiver, said transmitter being intended to transmit a carrying signal formed by at least one reference sequence including an integer number of pulses dispatched over a same integer number of time windows, which method includes at least one signal detection step to be executed at the receiver end, in the course of which signal detection step at least one detection value representative of an amount of power carried by a received signal is computed and compared to at least one predetermined threshold value, method according to which the integer number of pulses included in any given reference sequence is tunable.

2. ) A method as claimed in claim 1, according to which the integer number of pulses included in any given reference sequence is selected from a predetermined set of integer numbers.

3. ) A method as claimed in claim 2, according to which the integer numbers included in said set are successive multiples of a same initial integer number.

4. ) A method as claimed in any one of claims 1 to 3, in the course of which an initial signal transmission step is to be carried out by the transmitter by selecting an initial number of pulses for constituting an initial reference pulse sequence to be transmitted, the number of pulses constituting the reference pulse sequence being gradually increased for carrying out subsequent signal transmission steps until reception by the transmitter of an acknowledgement signal signifying that the last transmitted sequence has actually been received by its intended receiver.

5. ) A telecommunication system including at least one transmitter and one receiver, said transmitter being intended to transmit a carrying signal formed by at least one reference sequence including an integer number of pulses dispatched over a same integer number of time windows, system in which the receiver includes signal detection means intended to compute at least one detection value representative of an amount of power carried by each pulse sequence and to compare said detection value to at least one predetermined threshold value, system including tuning means for tuning the integer number of pulses included in any given reference sequence.

6. ) A telecommunication system as claimed in claim 5, in which the transmitter includes means for selecting, from a predetermined set of integer numbers, the integer number of pulses to be included in a given reference sequence to be transmitted.

7. ) A telecommunication system as claimed in claim 6, in which the receiver includes means for selecting, from a predetermined set of integer numbers, the integer number of pulses to be included in a reference sequence expected to be received.

8. ) A telecommunication system as claimed in any one of claims 6 or 7, in which the transmitter includes number selection means adapted for selecting an initial number of pulses for constituting an initial reference pulse sequence to be transmitted, which number selection means are further adapted for gradually increasing the number of pulses constituting subsequent reference pulse sequences until reception by the transmitter of an acknowledgement signal signifying that the last transmitted sequence has actually been received by its intended receiver.

9. ) A device intended to transmit a signal formed by at least one reference sequence including an integer number of pulses dispatched over a same integer number of time windows, which device includes symbol encoding means intended to multiply said reference sequence with at least one integer value, which device further includes tuning means for tuning the integer number of pulses included in a reference sequence to be transmitted by said device.

10. ) A device intended to receive a signal formed by at least one reference sequence including an integer number of pulses dispatched over a same integer number of time windows, which device includes signal detection means intended to compute at least one detection value representative of an amount of power carried by each pulse sequence and to compare said detection value to at least one predetermined threshold value, which device further includes tuning means for tuning the integer number of pulses included in a reference sequence expected to be received by said device.

11. ) A pulse sequence to be transmitted between a transmitter and a receiver, which pulse sequence includes an integer number of pulses dispatched over a same integer number of time windows, said number of pulses having been tuned by said transmitter in order to compensate for adverse communication conditions affecting a wireless link through which said sequence is to be transmitted.