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2012-4-25

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3G��ǿ�ͼ��ò��ڼ��٣�FDD-LTE��WiMAX��ʼ��OFDM��Ƶ�ֶ�ַ��MIMO��¼��Ƶ��ʡ�δ��Ѿ��LTE+��TD-LTE+�Լ�802.16m�Ѿ��Ϊ4G��Ӻ��ļ��Ͽ��OFDM��MIMO��һЩС��ǿ�ͼ��⣬��Կ��µĸ��Լ��ĳ��֣��ΪOFDM�ȼ��70��ĩ��Ѿ��ˣ��û��һ��ȫ�µĶ�ַ��֡��ڿ��Ԥ��δ��ƶ��Լ��µ�ͻ�ơ�

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TD-LTE��ƶ��Ϊ��Ҫ��

2011�꣬�ƶ��ٽ�ȫ��Ӫ�̽��LTE��HSPA+��3G��ǿ�ͼ��ݽ��Դռ��ì��ͻ��ʹ��Wi-Fi��ͥ��ȼ��Ϊ��Ч��ֶΣ��ƶ��Ϣ��ҵ��չģʽ��ҵ��º��ն˷�չ��Ϊҵ��ע�ȵ㡣

�ƶ��Ŀ��ٷ�չ�ٽ�ȫ��3G�û��г��˿��ȶ��ƣ��Ϊ�ƶ�ͨ��г��Ҫ��2011��9�£�ȫ��ƶ��û��Ѵﵽ9.6�ڣ��긴��ʳ��20%��й��ƶ��г��û��ģ��3�ڣ��걣��100%�ĸ��ʡ��3G��ǿ�ͼ��г��ݶ��HSPA�ڸ��3G��û�ռ��Ѵﵽ43.7%��2011�꣬3G��Ӫ�̽��LTE��HSPA+��3G��ǿ�ͼ��ݽ��LTE��С��ģ��չ�׶Σ�HSPA��Ӫ��

TD-LTE��и��ݹ��ܣ��ʵ�ֿ��ٻ��ʺ͸��Ƶ�ȸ߼�Ӧ�á�Ŀǰ��չ��ٵ��ƶ��ҵ��Ϊδ��TD-LTE��Ҫ��㡣��ƶ��ҵ��У��Ƶ��Ϣ��Լ��λ�õķ��ѳ�Ϊ�û��ƶ��Ҫҵ��Ӫ�̷�չ�ƶ��ҵ��ص㡣��⣬ҵ��ձ��Ϊ��Ⱥ�Ļ��Ϸ��ҵ��TD-LTE��ҪӦ�õ㡣

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TD-LTE��棺һ��ʹ�û��Զ��ش��(HARQ)��ʱ��TD-LTFʹ�õĿ��LTE FDD��ӣ��ƽ��ʱ��(RTT)�Գ��FDD-LTE��8ms��ŵ�ռ��ͬһƵ�εĲ�ͬʱ϶��Ϊ�˱�֤��֡��׼ȷ��գ�ϵͳ��ն˺ͻ�վ��ͬ��Ҫ��ܸߡ�

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TD-LTEоƬ��Ҳ��˹��оƬ��ҵ��롣Ŀǰ��Դ��Ѷ��˼��о�Ƽ��չѶͨ�š��ſơ��΢��ӡ��ͨ��ǡ��ST-Ericsson��Sequans��Altair��AstriΪ��10��оƬ��Ѿ��з��TD-LTE��ƵоƬ��ڻ��оƬ��棬��Ѷ��˼��Sequans��ͨ��Ѿ��򼴽��ﵽר�ü��ɵ�·(A-SIC)�׶Σ��о�Ƽ��ſ��Լ��˻��ֳ��ɱ��(FPGA)�׶Σ��Ѿ��ڽ��ṩ�򼴽��ṩFPGA��԰��ϵͳ��ԣ��Щ��ҵ��2011��Ƴ��ƵоƬ��棬��΢��ӵĹ��Ƭ�Ѿ��ʼ��ã�Ŀǰר��ƵоƬ��ܸߣ��೧�̶��ʹ��о�Ƽ��ṩ��һ��ƵоƬ��оƬ��з��FDD-LTE��ȣ�TD-LTE��ն�оƬ��нϴ�Ĳ�ࡣ

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