MODULE FOR USE IN MOBILE COMMUNICATION TERMINAL AND MOBILE COMMUNICATION TERMINAL APPLYING THE SAME THEREIN

• US 20110134810A1
• Filed: 12/07/2010
• Published: 06/09/2011
• Est. Priority Date: 12/07/2009
• Status: Abandoned Application

• Current Assignee: Hitachi Media Electronics Co., Ltd. (Hitachi, Ltd.)
• Original Assignee: Hitachi Media Electronics Co., Ltd. (Hitachi, Ltd.)
• Inventors: Shiba, Takashi, Yamamoto, Akio, Akiyama, Hitoshi, Hikino, Osamu
• Application Number:
  US12/961,771
• Publication Number:
  US 20110134810A1
• Time in Patent Office: Days
• US Class Current: 370/278
• CPC Class Codes: H04L 2025/03503 as a combination of feedback and prediction filters
• CPC Class Codes: H04L 2025/03573 between recursive and non-recursive
• CPC Class Codes: H04L 5/143 for modulated signals H04L5/1469 takes precedence
• CPC Class Codes: H04L 5/1461 Suppression of signals in the return path, i.e. bidirectional control circuits

Abstract

For providing a module for use of a mobile communication terminal, being small in sizes and high in reliability, and enabling with plural numbers of bands, and also a mobile communication terminal with using the same therein, canceling is conducted on transmission signal and/or noises of reception band on reception side with using a feed forward technology, for maintaining a degree of suppression of the transmission signal and/or the noises of reception band on the reception side. In this case, for achieving the cancellation of wide band signals from the transmission signal to the reception band, a delay adjusting function is used, in addition to gain and phase adjusting functions. Also, for conducting stable canceling of jamming signals, controls are conducted on the gain, the phase and the delay of a loop with using a reception SN and/or a CQI signal, etc.

Further, for achieving low power consumption, a feed forward loop can be made ON/OFF depending on a level of the transmission signal.

Claims

1. A module for use in a mobile communication terminal, for executing transmission/reception simultaneous operation, with using different frequency bands as transmission frequency and reception frequency, comprising:

a filter having variable characteristics, which is configured to separate a transmission signal and a reception signal, and configured to pass plural numbers of frequency signals therethrough, selectively; and

a jamming signal cancel portion, which is configured to cancel the transmission signal leaking from a transmission side to a reception side and noises of reception band on the transmission side by a predetermined amount thereof.

2. The module for use in a mobile communication terminal, as is described in the claim 1, further comprising

a distortion cancel portion, which is configured to cancel distortion generated due to the transmission signal leaking from the transmission side to the reception side.

3. The module for use in a mobile communication terminal, as is described in the claim 1, wherein

said jamming signal cancel portion comprises a block, which is configured to control an amplitude, a phase and a delay time of a jamming signal, thereby controlling the amplitude, the phase and the delay time of the jamming signal in such that SN of the reception signal comes to optimal.

4. The module for use in a mobile communication terminal, as is described in the claim 1, wherein

said jamming signal cancel portion exchanges ON/OFF of an operation of canceling the transmission signal leaking from the transmission side to the reception side and the noises of reception band on the transmission side by a predetermined amount thereof, depending on a level of a jamming signal or an amplitude of SN of the reception signal.

5. The module for use in a mobile communication terminal, as is described in the claim 1, wherein said filter is a circulator.

6. The module for use in a mobile communication terminal, as is described in the claim 2, wherein said filter is a circulator.

7. The module for use in a mobile communication terminal, as is described in the claim 3, wherein said filter is a circulator.

8. The module for use in a mobile communication terminal, as is described in the claim 4, wherein said filter is a circulator.

9. A mobile communication terminal, comprising:

a module for use in a mobile communication terminal as is described in the claim 1, whereby executing the transmission/reception simultaneous operation, with using the different frequency bands as the transmission frequency and the reception frequency.

10. A mobile communication terminal, comprising:

a module for use in a mobile communication terminal as is described in the claim 2, whereby executing the transmission/reception simultaneous operation, with using the different frequency bands as the transmission frequency and the reception frequency.

11. A mobile communication terminal, comprising:

a module for use in a mobile communication terminal as is described in the claim 3, whereby executing the transmission/reception simultaneous operation, with using the different frequency bands as the transmission frequency and the reception frequency.

12. A mobile communication terminal, comprising:

a module for use in a mobile communication terminal as is described in the claim 4, whereby executing the transmission/reception simultaneous operation, with using the different frequency bands as the transmission frequency and the reception frequency.

13. A mobile communication terminal, comprising:

a module for use in a mobile communication terminal as is described in the claim 5, whereby executing the transmission/reception simultaneous operation, with using the different frequency bands as the transmission frequency and the reception frequency.

14. A mobile communication terminal, comprising:

a module for use in a mobile communication terminal as is described in the claim 6, whereby executing the transmission/reception simultaneous operation, with using the different frequency bands as the transmission frequency and the reception frequency.

15. A mobile communication terminal, comprising:

a module for use in a mobile communication terminal as is described in the claim 7, whereby executing the transmission/reception simultaneous operation, with using the different frequency bands as the transmission frequency and the reception frequency.

16. A mobile communication terminal, comprising:

a module for use in a mobile communication terminal as is described in the claim 8, whereby executing the transmission/reception simultaneous operation, with using the different frequency bands as the transmission frequency and the reception frequency.