Time division multiple access FDD wireless unit and time division multiple access FDD/TDD dual mode wireless unit

A time division multiple access FDD wireless unit, comprising:

• first oscillation means for producing a first reference signal at a first reference frequency;
• second oscillation means for producing a second reference signal at a second reference frequency;
• first frequency conversion means for converting the second reference frequency of the second reference signal output by said second oscillation means to a third reference frequency of the second reference signal, the third reference frequency of the second reference signal being equal to the second reference frequency of the second reference signal multiplied or divided by n, wherein n is an integer not less than 1;
• second frequency conversion means for converting the second reference frequency of the second reference signal output by said second oscillation means to a fourth reference frequency of the second reference signal, the fourth reference frequency of the second reference signal being equal to the second reference frequency of the second reference signal multiplied or divided by m, wherein m is an integer not less than 1;
• first received signal conversion means for converting a first frequency for a received signal to a second frequency for the received signal, the second frequency for the received signal being equal to a difference between the first frequency for the received signal and the first reference frequency of the first reference signal output by said first oscillation means;
• second received signal conversion means for converting the second frequency for the received signal to a third frequency for the received signal, the third frequency for the received signal being equal to a sum of or a difference between the second frequency for the received signal output by said first received signal conversion means and the third reference frequency of the second reference signal output by said first frequency conversion means;
• modulation means for modulating a transmission signal at a first frequency for the transmission signal, the first frequency for the transmission signal being equal to the fourth reference frequency of the second reference signal output by said second frequency conversion means;
• transmission signal conversion means for converting the first frequency for the transmission signal to a second frequency for the transmission signal, the second frequency for the transmission signal being equal to a sum of the first frequency for the transmission signal output by said modulation means and the first reference frequency of the first reference signal output by said first oscillation means, such that
• the second frequency for the transmission signal output from said transmission signal conversion means is different from the first frequency for the received signal.

A time division multiple access FDD/TDD dual mode wireless unit, comprising:

• first oscillation means for producing a first reference signal at a first reference frequency;
• third oscillation means for producing a third reference signal at a third reference frequency;
• first FDD received signal conversion means for converting a first frequency for a received signal to a second frequency for the received signal, the second frequency for the received signal being equal to a difference between the first frequency for the received signal and the first reference frequency of the first reference signal output by said first oscillation means;
• second FDD received signal conversion means for converting the second frequency for the received signal to a third frequency for the received signal, the third frequency for the received signal being equal to a sum of or a difference between the second frequency for the received signal produced by said first FDD received signal conversion means and a second reference frequency of a second reference signal;
• first TDD received signal conversion means for converting a first frequency for the received signal to a fourth frequency for the received signal, the fourth frequency for the received signal being equal to a difference between the first frequency for the received signal and the third reference frequency of the third reference signal output by said third oscillation means;
• second TDD received signal conversion means for converting the fourth frequency for the received signal to a fifth frequency for the received signal, the fifth frequency for the received signal being equal to a sum of or a difference between the fourth frequency for the received signal produced by said first TDD received signal conversion means and a fourth reference frequency of a fourth reference signal;
• modulation means for modulating a transmission signal at a first frequency for the transmission signal, the first frequency for the transmission signal being equal to the fourth reference frequency of the fourth reference signal;
• selection means for selecting either of the first reference signal at the first reference frequency output by said first oscillation means or the third reference signal at the third reference freguancy output by said third oscillation means;
• transmission signal conversion means for converting the first frequency for the transmission signal to a second frequency for the transmission signal, the second frequency for the transmission signal being equal to a sum of the reference frequency of the selected reference signal selected by said selection means and the first frequency for the transmission signal output by said modulation means;
• and
• system switching means for switching the received signal to said first FDD received signal conversion means when the received signal is a FDD signal, and for switching said received signal to said first TDD received signal conversion means when the received signal is a TDD signal,
• the second and fourth reference frequencies being such that
• the second reference signal at the second reference frequency is produced by a second oscillation means and the fourth reference frequency of the fourth reference signal is obtained by multiplying or dividing the second reference frequency of the second reference signal by a first predetermined value, or
• the fourth reference signal at the fourth reference frequency is produced by a fourth oscillation means and the second reference frequency of the second reference signal is obtained by multiplying or dividing the fourth reference frequency of the fourth reference signal by a second predetermined value.

A time division multiple access FDD/TDD dual mode wireless unit, comprising:

• first FDD received signal conversion means for converting a first frequency for a received signal to a second frequency for the received signal, the second frequency for the received signal being equal to a difference between the first frequency for the received signal and a first reference frequency of a first reference signal;
• second FDD received signal conversion means for converting the second frequency for the received signal to a third frequency for the received signal, the third frequency for the received signal being equal to a sum of or a difference between the second frequency for the received signal output by said first FDD received signal conversion means and a second reference frequency of a second reference signal;
• first TDD received signal conversion means for converting the first frequency for the received signal to a fourth frequency for the received signal, the fourth frequency for the received signal being equal to a difference between the first frequency for the received signal and a third reference frequency of a third reference signal;
• second TDD received signal conversion means for converting the fourth frequency for the received signal to a fifth frequency for the received signal, the fifth frequency for the received signal being equal to a sum of or a difference between the fourth frequency for the received signal output by said first TDD received signal conversion means and a fourth reference frequency of a fourth reference signal;
• modulation means for modulating a transmission signal at a first frequency for the transmission signal, the first frequency for the transmission signal being equal to the fourth reference frequency of the fourth reference signal;
• selection means for selecting either of the first reference signal at the first reference frequency or the third reference signal at the third reference frequency;
• transmission signal conversion means for converting the first frequency for the transmission signal to a second frequency for the transmission signal, the second frequency for the transmission signal being equal to a sum of the reference frequency for the reference signal selected by said selection means and the first frequency for the transmission signal output by said modulation means;
• 2-band frequency synthesizer for switching between and producing the first reference signal at the first reference frequency and the third reference signal at the third reference frequency;
• and
• system switching means for switching the received signal to said first FDD received signal conversion means when the received signal is a FDD signal, and for switching the received signal to said first TDD received signal conversion means when the received signal is a TDD signal.

A time division multiple access FDD/TDD dual mode wireless unit, comprising;

• first oscillation means for producing a first reference signal at a first reference frequency;
• second oscillation means for producing a second reference signal at a second reference frequency;
• first frequency conversion means for converting the second reference frequency of the second reference signal output by said second oscillation means to a third reference frequency of the second reference signal, the third reference frequency of the second reference signal being equal to the second reference frequency of the second reference signal multiplied or divided by n, wherein n is an integer not less than 1;
• second frequency conversion means for converting the second reference frequency of the signal output by said second oscillation means to a fourth reference frequency of the second reference signal, the fourth reference frequency of the second reference signal being equal to the second reference frequency for the second reference signal multiplied or divided by m, wherein m is an integer not less than 1;
• third oscillation means for producing a third reference signal at a fifth reference frequency;
• first FDT received signal conversion means for converting a first frequency for a received signal to a second frequency for the received signal, the second frequency for the received signal being equal to a difference between the first frequency for the received signal and the first reference frequency of the first reference signal output by said first oscillation means;
• second FDD received signal conversion means for converting the second frequency for the received signal to a third frequency for the received signal, the third frequency for the received signal being equal to a sum of or a difference between the second frequency for the received signal output by said first FDD received signal conversion means and the third reference frequency of the second reference signal output by said first frequency conversion means;
• first TDD received signal conversion means for converting the first frequency for the received signal to a fourth frequency for the received eignal, the fourth frequency for the received signal being equal to a difference between the first frequency for the received signal and the fifth reference frequency of the third reference signal output by said third oscillation means;
• second TDD received signal conversion means for converting the fourth frequency for the received signal to a fifth frequency for the received signal, the fifth frequency for the received signal being equal to a sum of or a difference between the fourth frequency for the received signal output by said first TDD received signal conversion means and the fourth reference frequency of the second reference signal output by said second frequency conversion means;
• modulation means for modulating a transmission signal at a first frequency for the transmission signal, the first frequency for the transmission signal being equal to the fourth reference frequency of the second reference signal output by said second frequency conversion means;
• selection means for selecting either the first reference signal having the first reference frequency output by said first oscillation means or the third reference signal having the fifth reference frequency output by said third oscillation means;
• transmission signal conversion means for converting the first frequency for the transmission signal to a second frequency for the transmission signal, the second frequency for the transmission signal being equal to a sum of the reference frequency of the reference signal selected by said selection means and the first frequency for the transmission signal output by said modulation means;
• and
• system switching means for switching the received signal to said first FDD received signal conversion means when the received signal is a FDD signal, and switching the received signal to said first ADD received signal conversion means when the received signal is a TDD signal.