΢²¨EDAÍø£¬¼ûÖ¤Ñз¢¹¤³ÌʦµÄ³É³¤£¡
Ê×Ò³ > Ñз¢ÎÊ´ð > Òƶ¯Í¨ÐÅ > 4G LTE > ΪʲôͬһλÖÃ2GµÄ³¡Ç¿ÊÇ-60¶ø4GµÄÊÇ-80¶àÄØ£¿

ΪʲôͬһλÖÃ2GµÄ³¡Ç¿ÊÇ-60¶ø4GµÄÊÇ-80¶àÄØ£¿

ʱ¼ä£º04-01 ÕûÀí£º3721RD µã»÷£º
ÈçÌâ¡£
ÈçÌ⣬µ±ÎÒÃDzâÊÔʱ·¢ÏÖ£¬2GºÍ4GÔÚͬһµØµãλÖòâÊÔ£¬2GµÄ³¡Ç¿ÊÇ-60×óÓÒ£¬¶ø4GÈ´µ½ÁË-80¶à¡£

2G³¡Ç¿-100ÒѾ­ºÜ²îÁË£¬ÎªÊ²Ã´4Gµ½-110²ÅËã²îµãÄØ£¿

ÒòΪÕâÊÇÓɲ»Í¬µÄ×ÓÔز¨´ø¿íµ¼Öµġ£
2GÒÔCDMAΪÀý£¬Îª´ø¿í1.25KHzÉϵij¡Ç¿
4GLTE£¬Îª´ø¿í180KHZÉϵij¡Ç¿¡£
10log(180/1.25)=21dB
²îµÄ20dB¾ÍÔÚÕâÀï¡£

Copyright © 2017-2020 ΢²¨EDAÍø °æȨËùÓÐ

ÍøÕ¾µØͼ

Top