Concept for transmitting and receiving an information symbol

• US 9,595,984 B2
• Filed: 11/15/2013
• Issued: 03/14/2017
• Est. Priority Date: 11/20/2012
• Status: Active Grant

• Current Assignee: ZF Friedrichshafen AG (Zeppelin - Stiftung der Stadt Friedrichshafen)
• Original Assignee: ZF Friedrichshafen AG (Zeppelin - Stiftung der Stadt Friedrichshafen)
• Inventors: Seeger, Martin
• Primary Examiner(s): VARNDELL, ROSS E
• Application Number:
  US14/080,828
• Publication Number:
  US 20140140434A1
• Time in Patent Office: 1,215 Days
• US Class Current: 1/1
• CPC Class Codes: H04B 1/06 Receivers
• CPC Class Codes: H04L 27/02 Amplitude-modulated carrier systems, e.g. using on-off keying; Single sideband or vestigial sideband modulation H04L27/32 takes precedence
• CPC Class Codes: H04L 27/2278 using correlation techniques, e.g. for spread spectrum signals

Abstract

Devices, methods and examples concerning a concept for transmitting an information symbol from a symbol alphabet (I₀; I₁; I₂; I₃). For a first information symbol (I₁) from the symbol alphabet, a first signal sequence (S₁) is transmitted. For a second information symbol (I₂) of the symbol alphabet, a second signal sequence (S₂) is transmitted. A cross-correlation between the first signal sequence (S₁) and the second signal sequence (S₂) is lower than a predetermined cross-correlation threshold (Ψ_threshold). For a third information symbol (I₃) of the symbol alphabet, a third signal sequence (S₃) is transmitted such that both a cross-correlation between the third signal sequence (S₃) and the first signal sequence (S₁) and also a cross-correlation between the third signal sequence (S₃) and the second signal sequence (S₂) are above the predetermined cross-correlation threshold (Ψ_threshold).

Claims

1. A device (100) for transmitting an information symbol of a symbol alphabet (I₀;

I₁;

I₂;

I₃), the device comprising;

a transmitter (110) designed to transmit, for a first information symbol (I₁) of the symbol alphabet, a first signal sequence (S₁);

the transmitter (110) also being designed to transmit, for a second information symbol (I₂) of the symbol alphabet, a second signal sequence (S₂);

such that a cross-correlation, between the first signal sequence (S₁) and the second signal sequence (S₂), is below a predetermined cross-correlation threshold (Ψ

_threshold); and

the transmitter (110) being designed to transmit, for a third information symbol (I₃) of the symbol alphabet, a third signal sequence (S₃);

such that both a cross-correlation, between the third signal sequence (S₃) and the first signal sequence (S₁), and also a cross-correlation, between the third signal sequence (S₃) and the second signal sequence (S₂), are both above the predetermined cross-correlation threshold (Ψ

_threshold), and the predetermined cross-correlation threshold is smaller than any auto-correlation value, at a time point where lag is essentially zero, of the first, the second and the third signal sequences and larger than a cross-correlation value, at a time point where the lag is essentially zero, between the first and the second signal sequences.

2. The device (100) according to claim 1, wherein the first, the second and the third signal sequences are, in each case, binary sequences, and

the transmitter (110) is designed to transmit the first, the second and the third signal sequences by on-off-keying.

3. The device (100) according to claim 1, wherein the transmitter (110) is designed to transmit sequentially the first, the second and the third signal sequences.

4. The device (100) according to claim 1, wherein the transmitter (110) is designed to transmit no signal sequence for a fourth information symbol (I₀) of the symbol alphabet.

5. The device (100) according to claim 1, wherein the first, the second and the third information symbols (I₀;

I₁;

I₂;

I₃) can be represented by a combination of binary digits and the transmitter (110) is designed;

to transmit the first signal sequence (S₁), if a first binary digit of the first information symbol corresponding thereto has a value of “

1” and

a second binary digit of the second information symbol corresponding to the second signal sequence (S₂) has a value of “

0”

,

to transmit the second signal sequence (S₂), if the second binary digit of the information symbol corresponding thereto has a value of “

1” and

the first binary digit of the information symbol has a value of “

0”

, and

to transmit the third signal sequence (S₃), if both the first and also the second binary digits of the information symbol have the value of “

1”

.

6. The device (100) according to claim 1, wherein the transmitter (110) is designed for wireless transmission of the first, the second and the third signal sequences by way of a radio interface to a receiving device.

7. A device (200) for receiving an information symbol (I₀;

I₁;

I₂;

I₃) from a received signal (205), the device comprising;

a correlation stage (210) designed such that if a cross-correlation between a first signal sequence (S₁) that corresponds to a first information symbol (I₁) of a symbol alphabet (I₀;

I₁;

I₂;

I₃) and the received signal (205) is above a predetermined correlation threshold (Ψ

_threshold), the first information symbol (I₁) is registered,

the correlation stage (210) is also designed such that if a cross-correlation between a second signal sequence (S₂), which corresponds to a second information symbol (I₂) of the symbol alphabet (I₀;

I₁;

I₂;

I₃), and the received signal (205) is above the predetermined correlation threshold (Ψ

_threshold), the second information symbol (I₂) is registered; and

the correlation stage (210) is designed such that if a cross-correlation between the first signal sequence (S₁) and the received signal (205) and also a cross-correlation between the second signal sequence (S₂) and the received signal (205) are both above the predetermined correlation threshold (Ψ

_threshold), a third information symbol (I₃) from the symbol alphabet (I₀;

I₁;

I₂;

I₃) is registered;

wherein the predetermined correlation threshold is smaller any auto-correlation value, at a time point where lag is essentially zero, of the first, second, and the third signal sequences and larger than a cross-correlation value, at a time point where the lag is essentially zero, between the first and the second signal sequences.

8. A method of transmitting an information symbol from a symbol alphabet (I₀;

I₁;

I₂;

I₃), the method comprising;

selecting a first signal sequence for a first information symbol from the symbol alphabet;

transmitting with a transmitter, for the first information symbol (I₁) from the symbol alphabet, the first signal sequence (S₁);

selecting a second signal sequence for a second information symbol from the symbol alphabet;

transmitting with the transmitter, for the second information symbol (I₂) from the symbol alphabet, the second signal sequence (S₂);

setting a predetermined cross-correlation threshold, and the first and the second signal sequences being selected such that a cross-correlation, between the first signal sequence (S₁) and the second signal sequence (S₂), is lower than the predetermined cross-correlation threshold (Ψ

_threshold); and

selecting a third signal sequence for a third information symbol of the symbol alphabet;

transmitting with the transmitter, for the third information symbol (I₃) of the symbol alphabet, the third signal sequence (S₃),

the predetermined cross-correlation threshold is smaller than any auto-correlation value, at a time point where lag is essentially zero, of the first, the second and the third signal sequences and larger than a cross-correlation value, at a time point where the lag is essentially zero, between the first and the second signal sequences,

the third signal sequence being selected such that a cross-correlation, between the third signal sequence (S₃) and the first signal sequence (S₁), and also a cross-correlation, between the third signal sequence (S₃) and the second signal sequence (S₂), are both above the predetermined cross-correlation threshold (Ψ

_threshold).

9. A method for receiving an information symbol (I₀;

I₁;

I₂;

I₃) from a received signal (205), the method comprising;

registering with a correlation stage, a first information symbol (I₁), if a cross-correlation between a first signal sequence (S₁), that corresponds to the first information symbol (I₁) from a symbol alphabet (I₀;

I₁;

I₂;

I₃), and the received signal (205) is above a predetermined correlation threshold (Ψ

_threshold);

registering with the correlation stage a second information symbol (I₂), if a cross-correlation between a second signal sequence (S₂), that corresponds to a second information symbol (I₂) from the symbol alphabet (I₀;

I₁;

I₂;

I₃), and the received signal (205) is above the predetermined correlation threshold (Ψ

_threshold); and

registering with the correlation stage a third information symbol (I₃) from the symbol alphabet (I₀;

I₁;

I₂;

I₃), if a cross-correlation, between the first signal sequence (S₁) and the received signal (205), and also a cross-correlation, between the second signal sequence (S₂) and the received signal (205), are both above the predetermined correlation threshold (Ψ

_threshold); and

the predetermined correlation threshold is smaller than any auto-correlation value, at a time point where lag is essentially zero, of the first, the second and the third signal sequences and larger than a cross-correlation value, at a time point where the lag is essentially zero, between the first and the second signal sequences.

10. A computer program with a program code that operates on a programmable hardware component for carrying out a method of transmitting an information symbol from a symbol alphabet (I₀;

I₁;

I₂;

I₃), the method comprising;

transmitting with the programmable hardware component, for a first information symbol (I₁) from the symbol alphabet, a first signal sequence (S₁);

transmitting with the programmable hardware component, for a second information symbol (I₂) from the symbol alphabet, a second signal sequence (S₂);

such that a cross-correlation, between the first signal sequence (S₁) and the second signal sequence (S₂), is lower than a predetermined cross-correlation threshold (Ψ

_threshold); and

transmitting with the programmable hardware component, for a third information symbol (I₃) of the symbol alphabet, a third signal sequence (S₃);

such that a cross-correlation, between the third signal sequence (S₃) and the first signal sequence (S₁), and also a cross-correlation, between the third signal sequence (S₃) and the second signal sequence (S₂), are both above the predetermined cross-correlation threshold (Ψ

_threshold); and

the predetermined cross-correlation threshold is smaller than any auto-correlation value, at a time point where lag is essentially zero, of the first, the second and the third signal sequences and larger than a cross-correlation value, at a time point where the lag is essentially zero, between the first and the second signal sequences.