# US 8,787,856 B2 · Method and system for receiving radio stations > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 8,787,856 B2 - Document ID: US8787856B2 - Status: Granted - Kind: B2 - Application number: 13/512,522 - Filed: 2010-10-22 - Published: 2012-11-29 - Granted: 2014-07-22 - Earliest claimed: 2009-12-02 - Assignees: Robert Bosch GmbH - Applicants: Carsten Lehr; Detlev Nyenhuis; Marcus Risse - Inventors: Carsten Lehr; Detlev Nyenhuis; Marcus Risse - Web page: https://patentgrep.com/patent/US8787856B2 ## CPC - H04B 1/0007: {wherein the AD/DA conversion occurs at radiofrequency or intermediate frequency stage} - H04B 1/0053: {with common antenna for more than one band} - H04B 1/0092: {using a wideband front end} - H04B 7/028: {Spatial transmit diversity using a single antenna at the transmitter} - H04B 7/084: {Equal gain combining, only phase adjustments (antenna beam scanning or forming by phase or amplitude control H01Q3/26, e.g. phased arrays)} - H04B 7/0885: {with combination} - H04B 7/12: Frequency diversity - H04B: TRANSMISSION ## Abstract A system for receiving radio stations includes: at least one A/D converter in order to digitize the entire desired frequency band, for instance, an FM band, received via at least one antenna, and a demodulation unit for demodulating at least two signals of different transmitting frequencies of a radio station. ## Claims ### Claim 1 A system for receiving radio transmissions from an FM radio station, comprising: at least one A/D converter to digitize an entire FM frequency band received via at least one antenna to produce a plurality of signals of different transmitting frequencies of the FM radio station; and a digital signal processing unit for subsequently: evaluating a reception quality of the plurality of signals of different transmitting frequencies of the FM radio station; selecting at least two signals of different transmitting frequencies of the FM radio station based on the evaluating; demodulating the at least two signals of different transmitting frequencies of the FM radio station; and combining the at least two signals of different transmitting frequencies of the FM radio station. ### Claim 2 (depends on 1) The system of claim 1, wherein the digital signal processing unit simultaneously demodulates the at least two signals of different transmitting frequencies of the radio station to produce at least two respective demodulated signals, and combines the at least two respective demodulated signals. ### Claim 3 (depends on 1) The system of claim 1, wherein the evaluating of the reception quality of the plurality of signals of different transmitting frequencies of the FM radio station takes place repeatedly, and a different at least two signals of different transmitting frequencies of the FM radio station are subsequently selected and combined in response to the repeated evaluating. ### Claim 4 (depends on 1) The system of claim 1, wherein the at least one antenna is a single antenna. ### Claim 5 A method for receiving radio transmissions from an FM radio station, comprising: digitizing, using at least one A/D converter, an entire FM frequency band received via at least one antenna; subsequently, using a digital signal processing unit: evaluating a reception quality of a plurality of signals of different transmitting frequencies of the FM radio station; selecting at least two signals of different transmitting frequencies of the FM radio station based on the evaluating; demodulating the at least two signals of different transmitting frequencies of the FM radio station; and combining the at least two signals of different transmitting frequencies of the FM radio station. ### Claim 6 (depends on 5) The method as recited in claim 5, wherein higher quality signals are selected. ### Claim 7 (depends on 6) The method as recited in claim 6, wherein the evaluation of the reception quality takes place repeatedly, and wherein a switchover to another signal is performed depending on the reception quality of an evaluated signal. ### Claim 8 (depends on 7) The method as recited in claim 7, wherein the switchover to another signal takes place directly. ### Claim 9 (depends on 5) The method as recited in claim 5, wherein the at least two signals are weighted differently in the combination. ### Claim 10 (depends on 5) The method as recited in claim 5, wherein the combination takes place one of before or after the demodulation. ### Claim 11 (depends on 10) The method as recited in claim 10, wherein the at least two signals are synchronized in time. ### Claim 12 (depends on 10) The method as recited in claim 10, wherein the amplitudes of the at least two signals are adjusted. ### Claim 13 (depends on 5) The method of claim 5, wherein the demodulating includes simultaneously demodulating the at least two signals of different transmitting frequencies of the radio station to produce at least two respective demodulated signals, and the combining includes combining the at least two respective demodulated signals. ### Claim 14 (depends on 5) The method of claim 5, wherein the evaluating of the reception quality of the plurality of signals of different transmitting frequencies of the FM radio station takes place repeatedly, and a different at least two signals of different transmitting frequencies of the FM radio station are subsequently selected and combined in response to the repeated evaluating. ### Claim 15 (depends on 5) The method of claim 5, wherein the at least one antenna is a single antenna. ### Claim 16 A method for receiving radio transmissions from a radio station, the method comprising: digitizing, using at least one A/D converter, an entire desired frequency band received via at least one antenna; subsequently, using a digital signal processing unit: repeatedly evaluating a reception quality of each of a plurality of signals of different transmitting frequencies and selecting higher quality signals; demodulating at least two signals of the different transmitting frequencies of the radio station; combining the at least two signals; and depending on the reception quality of one of the evaluated signals, performing a switchover to another signal by cross-fading the two signals. ### Claim 17 A non-transitory computer-readable data storage medium storing a computer program having program codes which, when executed on a computer, perform a method for receiving radio transmissions from an FM radio station, the method comprising: digitizing, using at least one A/D converter, an entire FM frequency band received via at least one antenna to produce a plurality of signals of different transmitting frequencies of the FM radio station; and subsequently, using a digital signal processing unit: evaluating a reception quality of the plurality of signals of different transmitting frequencies of the FM radio station; selecting at least two signals of different transmitting frequencies of the FM radio station based on the evaluating; demodulating the at least two signals of different transmitting frequencies of the FM radio station; and combining the at least two signals of different transmitting frequencies of the FM radio station. ### Claim 18 (depends on 17) The non-transitory computer-readable storage medium of claim 17, wherein the demodulating includes simultaneously demodulating the at least two signals of different transmitting frequencies of the radio station to produce at least two respective demodulated signals, and the combining includes combining the at least two respective demodulated signals. ### Claim 19 (depends on 17) The non-transitory computer-readable storage medium of claim 17, wherein the evaluating of the reception quality of the plurality of signals of different transmitting frequencies of the FM radio station takes place repeatedly, and a different at least two signals of different transmitting frequencies of the FM radio station are subsequently selected and combined in response to the repeated evaluating. ### Claim 20 (depends on 17) The non-transitory computer-readable storage medium of claim 17, wherein the at least one antenna is a single antenna. ### Claim 21 A system for receiving radio transmissions from a radio station, comprising: at least one A/D converter configured to digitize an entire desired frequency band received via at least one antenna to produce a plurality of signals of different transmitting frequencies; and a digital signal processing unit configured to subsequently: repeatedly evaluate a reception quality of each of the plurality of signals of different transmitting frequencies and select higher quality signals; demodulate at least two signals of the different transmitting frequencies of the radio station; combine the at least two signals; and depending on the reception quality of one of the evaluated signals, perform a switchover to another signal by cross-fading the two signals.