Radio receiver for the reception of data bursts which are modulated with two modulation types
View Patent ↗The invention relates to a radio receiver for the reception of a data burst which is transmitted by a transmitter, in which case the data burst includes a first section which has been modulated using a first modulation method at the transmitter end, and a second section which is transmitted after the first section and has been modulated using a second modulation method at the transmitter end. The radio receiver has a first reception path for processing of the first section and a second reception path for processing of the second section.
1. A radio receiver for the reception of a data burst transmitted by a transmitter, wherein the data burst comprises a first section that has been modulated using a first modulation method, and a second section transmitted after the first section that has been modulated using a second modulation method, comprising:
a first reception path configured to process the first section of the data burst;
a second reception path configured to process the second section of the data burst;
a first common reception path connected upstream of the first reception path and the second reception path, the first common reception path comprising a band selection filter; and
a second common reception path comprising a clock recovery unit connected downstream from the first reception path and the second reception path,
wherein the clock recovery unit is configured to receive the processed first section from the first reception path and receive the processed second section from the second reception path, respectively, and determine a respective sampling phase in response thereto.
2. The radio receiver of claim 1 , wherein the first modulation method is a modulation method with a constant envelope, and the second modulation method is a linear modulation method.
3. The radio receiver of claim 2 , wherein the first reception path comprises a GFSK receiver, and the second reception path comprises a linear receiver.
4. The radio receiver of claim 1 , wherein the data burst comprises a time interval during which no data transmission takes place, and wherein the time interval is provided between the first section and the second section of the data burst, and wherein the band selection filter is configured to switch the bandwidth thereof between the first section and the second section such that any transients caused by switching decay during the time interval during which there is no transmission.
5. The radio receiver of claim 1 , wherein the first reception path comprises a limiting amplifier with a downstream discriminator, and the second reception path comprises an analogue/digital converter.
6. The radio receiver of claim 1 , wherein the second reception path is activated during reception of a data burst.
7. The radio receiver of claim 1 , wherein the first reception path further comprises a correction unit configured to determine one or more parameters associated with transmission of the data burst during processing of the first section of the data burst, and further configured to transmit the parameters to the second reception path.
8. The radio receiver of claim 1 , wherein the data burst transmission is based on the “Bluetooth Enhanced Data Rate” Standard.
9. A method for processing a data burst received by radio, wherein the data burst comprises a first section that has been modulated using a first modulation method, and a second section transmitted after the first section that has been modulated using a second modulation method, comprising:
processing the first section of the data burst by a first reception path;
processing the second section of the data burst by a second reception path;
band selection filtering the data burst in a first common reception path connected upstream of the first reception path and the second reception path; and
performing clock recovery for the processed first and second sections of the data burst in a second common reception path connected downstream from the first reception path and the second reception path, wherein a clock recovery component receives both the first processed section and the second processed section and performs the clock recovery based on the inputted first and second processed sections, respectively.
10. The method of claim 9 , wherein the first modulation method is a modulation method with a constant envelope, and the second modulation method is a linear modulation method.
11. The method of claim 10 , wherein the first reception path comprises a GFSK receiver and the second reception path comprises a linear receiver.
12. The method of claim 9 , further comprising providing a time interval during which no data transmission takes place between the first section and the second section of the data burst, and wherein any transients that are caused by a change in the bandwidth of the band selection filtering between the first section and the second section decay during the time interval.
13. The method of claim 9 , wherein the first reception path comprises a limiting amplifier with a downstream discriminator, and the second reception path comprises an analogue/digital converter.
14. The method of claim 9 , further comprising activating the second reception path during reception of the data burst.
15. The method of claim 9 , further comprising:
determining parameters in the first reception path during processing of the first section of the data burst; and
transmitting the determined parameters to the second reception path.
16. The method of claim 9 , wherein the transmission of the data burst is based on the “Bluetooth Enhanced Data Rate” Standard.