# US 10,122,482 B1 · Radio receiver system

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- Number: US 10,122,482 B1
- Document ID: US10122482B1
- Status: Granted
- Kind: B1
- Application number: 15/677,169
- Filed: 2017-08-15
- Granted: 2018-11-06
- Earliest claimed: 2017-08-15
- Assignees: NXP B.V.
- Applicants: NXP B.V.
- Inventors: Naveen Jacob; Rajesh Kurian
- Web page: https://patentgrep.com/patent/US10122482B1

## CPC

- H04H 20/93: which locates resources of other pieces of information, e.g. URL [Uniform Resource Locator]
- H04H 40/27: specially adapted for broadcast systems covered by groups H04H20/53 - H04H20/95
- H04H 60/27: Arrangements for recording or accumulating broadcast information or broadcast-related information
- H04H 60/41: for identifying broadcast space, i.e. broadcast channels, broadcast stations or broadcast areas
- H04H 2201/12: digital radio mondiale [DRM]
- H04H: BROADCAST COMMUNICATION (multiplex communication H04J; pictorial communication aspects of broadcast systems H04N)

## Abstract

A radio receiver is disclosed. The radio receiver includes an analog tuner and a baseband processor to provide radio functions. The baseband processor is coupled to the analog tuner. The radio receiver further includes a memory and a controller coupled to the analog tuner, the baseband processor and the memory. The controller is configured to perform an operation and the operation includes causing the analog tuner to scan a spectral band to identify radio stations and based on a signal matrix obtained from scanning a station in the spectral band tentatively determining if the station represents a digital radio mondiale (DRM) station and if so, storing the station in a list of possible DRM stations in the memory.

## Claims

### Claim 1

A radio receiver, comprising:
an analog tuner;
a baseband processor to provide radio functions, wherein the baseband processor is coupled to the analog tuner;
a memory; and
a controller coupled to the analog tuner, the baseband processor and the memory, wherein the controller is configured to perform an operation, the operation includes causing the analog tuner to scan a spectral band to identify radio stations and based on a signal matrix obtained from scanning a station in the spectral band tentatively determining that the station represents a digital radio mondiale (DRM) station and storing an identification of the station in a list of possible DRM stations in the memory, wherein the list of possible DRM stations includes DRM stations and band pass noise identified as tentative DRM stations.

### Claim 2 (depends on 1)

The radio receiver of claim 1, wherein the analog tuner is an amplitude modulation (AM) tuner.

### Claim 3 (depends on 2)

The radio receiver of claim 2, wherein the tentatively determining includes measuring if a carrier frequency offset is greater than 2 KHz.

### Claim 4 (depends on 2)

The radio receiver of claim 2, wherein the tentatively determining includes measuring if a dominant frequency is greater than 5 KHz.

### Claim 5 (depends on 2)

The radio receiver of claim 2, wherein the tentatively determining includes measuring if a high modulation index is unsettled.

### Claim 6 (depends on 1)

The radio receiver of claim 1, wherein the analog tuner is a frequency modulation (FM) tuner.

### Claim 7 (depends on 6)

The radio receiver of claim 6, wherein the tentatively determining includes measuring if a level detector result is an unsettled value.

### Claim 8 (depends on 6)

The radio receiver of claim 6, wherein the tentatively determining includes measuring if a multipath detector result is an unsettled value.

### Claim 9 (depends on 6)

The radio receiver of claim 6, wherein the tentatively determining includes measuring if a radio frequency offset is an arbitrary value.

### Claim 10 (depends on 1)

The radio receiver of claim 1, wherein the controller is further configured to scan stations in the list of possible DRM stations to remove stations that represent band pass noise.

### Claim 11 (depends on 1)

The radio receiver of claim 1, wherein the controller is further configured to identify AM or FM stations during the scanning for tentative DRM stations.

### Claim 12

A method for tentatively identifying digital radio mondiale (DRM) stations in a spectral band using an analog tuner, the method comprises:
scanning a station in a spectral band using the analog tuner;
based on a signal matrix obtained from the station in the spectral band tentatively determining that the station represents a digital radio mondiale (DRM) station and storing an identification of the station in a list of possible DRM stations in a memory, wherein the list of possible DRM stations includes DRM stations and band pass noise identified as tentative DRM stations.

### Claim 13 (depends on 12)

The method of claim 12, wherein the analog tuner is an amplitude modulation (AM) tuner.

### Claim 14 (depends on 13)

The method of claim 13, wherein the tentatively determining includes measuring if a carrier frequency offset is greater than 2 KHz.

### Claim 15 (depends on 13)

The method of claim 13, wherein the tentatively determining includes measuring if a dominant frequency is greater than 5 KHz.

### Claim 16 (depends on 13)

The method of claim 13, wherein the tentatively determining includes measuring if a high modulation index is unsettled.

### Claim 17 (depends on 12)

The method of claim 12, wherein the analog tuner is a frequency modulation (FM) tuner.

### Claim 18 (depends on 17)

The method of claim 17, wherein the tentatively determining includes measuring if a level detector result is an unsettled value.