| 1. | Pll - qpsk , phased - locked loop quadrature phase shift keying
锁相环四相相移键控 |
| 2. | Pll - qpsk phased - locked loop quadrature phase shift keying
锁相环四相相移键控 |
| 3. | Differential quadrature phase keying
差分四相相移键控 |
| 4. | Qpsk , quadrature phase shift keying
四相相移键控 |
| 5. | Qpsk quadrature phase shift keying
四相相移键控 |
| 6. | Ijf - oqpsk is actually to modulate the ijf codes by the offset quadrature phase shift keying
Ijf ? oqpsk实际上是对ijf信号再进行正交四相相移键控的调制技术。 |
| 7. | In particular , squeezing effects , due to the quantum fluctuation of one quadrature phase smaller than that in coherent state , can be used in optical communication and other fields
特别是具有压缩效应的量子态，由于在压缩态中光场振幅的量子涨落小于相干态相应的量子涨落，使得它在光通讯等领域有着广阔的应用前景。 |
| 8. | A study of the property of generalized nonlinear unequal - power nj - th power y - squeezing and nj - th power h - squeezing on a new type of multi - mode superposition state of the equal - intensity of symmetry superimposition state with distinguishable two quantum states light field . it was found that two quadrature phase - components of state always present cyclic - changed symmetry - complementary relation ; besides we can abtain that under the condition when nj = n , the result of document 26 and document 27 is only a special circumstance , but the result in this thesis is generalized appearance
结果发现：态， v恩)的两个正交相位分量的广义非线性不等幂次n _ j次方y压缩及n _ j次方h压缩效应总是呈现出周期性的对称互补关系：另外，文献26及文献27中的研究结果仅仅只是本文的一般性理论结果在压缩次数n _ j = n ( j = 1 ， 2 ， 3 ， … ， … ， q )这一条件下的特例。 |
| 9. | This project study the all - digital modulation and demodulation of / 4 offset differentially encoded quadrature phase shift keying ( / 4 - dqpsk ) . then use / 4 - dqpsk digital modulation and baseband differential demodulation technology to implement digital signal transmission . the bite rate is 500kb / s and the intermediate frequency is 2mhz
本课题对/ 4 - dqpsk的全数字调制解调技术进行研究,利用/ 4 - dqpsk数字调制和基带差分解调技术实现数字信号的传输,实现传输码率500kbps ,调制中频2mhz 。 |
| 10. | In quantum states which have squeezing effect , one quadrature phase may have reduced quantum fluctuations compared with what the relative quadrature phase have in coherent states , which makes it applied widely in optical communication systems , and so on . therefore , squeezed state of the radiation field is still a central topic in quantum optics
由于光场压缩态在其某一正交分量具有比相干态更小的量子噪声，因此，在实际应用中，如果用这一分量传递信息，则可得到比相干态光场更高的信噪比。 |
