Method for performing measurements in a wireless terminal and a wireless terminal

• US 7,039,364 B2
• Filed: 09/12/2002
• Issued: 05/02/2006
• Est. Priority Date: 09/14/2001
• Status: Expired due to Fees

• Current Assignee: Nokia Corporation
• Original Assignee: Nokia Corporation
• Inventors: Majaniemi, Markku
• Primary Examiner(s): Milord, Marceau
• Application Number:
  US10/242,915
• Publication Number:
  US 20030054772A1
• Time in Patent Office: 1,328 Days
• Field of Search: 455/67.11, 455/67.14, 455/423, 455/62, 455/63.1, 455/296, 375/219, 375/341, 375/344, 370/484, 370/514
• US Class Current: 455/67.11
• CPC Class Codes: H04W 88/02 Terminal devices

Abstract

The invention relates to a method for performing measurements in a wireless terminal comprising a receiver for receiving radio frequency signals, means for taking samples from the received signals and means for performing measurements on the basis of said samples. The samples taken from the received signal are stored. Measured values are calculated for the stored samples after a set of samples has been stored.

Claims

1. A method for performing measurements in a wireless terminal comprising:

receiving radio frequency signals;

taking samples (i,q) from the received signals; and

performing measurements on the basis of said samples, wherein the samples taken from the received signal are stored and measured values are calculated for the stored samples after a set of samples has been stored, and

wherein the measured values are used to search for a carrier wave in the received signal.

2. The method according to claim 1, wherein storing of samples and calculation of the measured value is repeated at intervals, wherein two or more samples are taken and stored between each successive calculation of the measured value.

3. The method according to claim 1, wherein the number of samples in said set of samples is selected.

4. The method according to claim 1, a predetermined number of stored samples are combined before calculating the measured value, wherein the combined samples are used for calculating the measured value.

5. The method according to claim 1, wherein in addition to sampling and storage said means for performing measurements execute one or more other applications between the different calculations of the measured values.

6. The method according to claim 1, wherein the calculated measured values are used for searching a carrier wave from the received signal.

7. The method according to claim 6, wherein the received signal is a signal transmitted by a base station of a mobile communication network, in which frequency correction bursts are transmitted on a frequency control channel, and the carrier wave to be searched for is a sine wave signal used in the transmission of the frequency correction burst.

8. A wireless terminal eempfising comprising:

a receiver for receiving radio frequency signals;

means for taking samples from the received signals; and

means for performing measurements on the basis of said samples,

wherein the wireless terminal further comprises means for storing samples taken from the received signal signal, and means for starting the calculation of the measured values after a set of samples has been stored, and

wherein the measured values are used to search for a carrier wave in the received signal.

9. The wireless terminal according to claim 8, wherein it comprises means for repeating the storing of samples and calculation of the measured value at intervals, wherein two or more samples are arranged to be taken and stored between each successive calculation of the measured value.

10. The wireless terminal according to claim 8, wherein it comprises means for selecting the number of samples in said set of samples.

11. The wireless terminal according to claim 8, wherein it comprises means for combining a predetermined number of stored samples before the measured value is calculated and means for using the combined samples in the calculation of the measured value.

12. The wireless terminal according to claim 8, wherein in addition to sampling and storage, said means (3) for performing measurements arranged to execute one or more other applications between the different calculations of the measured values.

13. The wireless terminal according to claim 8, wherein it comprises means for searching for a carrier wave on the basis of the measured values calculated from the received signal.

14. The wireless terminal according to claim 13, wherein the received signal is a signal transmitted by a base station of a mobile communication network, in which frequency correction bursts are transmitted on a frequency control channel, and the carrier wave to be searched for is a sine wave signal used in the transmission of the frequency correction burst.

15. A system comprising:

a wireless terminal including a receiver for receiving radio frequency signals, means for taking samples from the received signals, and means for performing measurements on the basis of said samples,

the system further comprising means for storing samples taken from the received signal, and means for starting the calculation of the measured values after a set of samples has been stored, and

wherein the measured values are used to search for a carrier wave in the received signal.

16. The system according to claim 15, wherein in addition to sampling and storage, one or more other applications are arranged to be executed between the calculations of the measured values.

17. A method for performing measurements in a wireless terminal comprising:

receiving radio frequency signals transmitted by a base station of a mobile communication network, in which frequency correction bursts are transmitted on a frequency control channel,

taking samples (i,q) from the received signals, and

performing measurements on the basis of said samples, in which method the samples taken from the received signal are stored and measured values are calculated for the stored samples after a set of samples has been stored, storing of samples and calculation of the measured value is repeated at intervals, wherein two or more samples are taken and stored between each successive calculation of the measured value, the calculated measured values are used for searching a carrier wave from the received signal, and the carrier wave to be searched for is a sine wave signal used in the transmission of the frequency correction burst.

18. A wireless terminal comprising:

a receiver for receiving radio frequency signals transmitted by a base station of a mobile communication network, in which frequency correction bursts are transmitted on a frequency control channel,

means for taking samples from the received signals, and

means for performing measurements on the basis of said samples, the wireless terminal further comprising;

means for storing samples taken from the received signal

means for starting the calculation of the measured values after a set of samples has been stored, and

means for searching for a carrier wave on the basis of the measured values calculated from the received signal,

and the carrier wave to be searched for is a sine wave signal used in the transmission of the frequency correction burst.