| 1. | A remote record system is designed based on power line carrier communication
本文运用电力线载波技术设计了一种远程抄表系统。 |
| 2. | So cdma is irrefutablely competitive . however , the capacity of conventional cdma communication system is confined by multi - access interference ( mai ) and multi - path interference ( mpi )
但是cdma的容量却受限于多址干扰与多径干扰，而多载波技术具有很强的抗多径干扰的能力。 |
| 3. | Chapter 1 gives a brief description of the development of mobile communication and software radio technology , followed by expatiation on theory of ofdm and ofdm - cdma
第一章介绍了移动通信和软件无线电技术的发展历史和发展趋势、并简要介绍了ofdm多载波技术以及ofdm ? cdma系统的原理。 |
| 4. | My work focused on the experiments and research of the communication system through power lines based on the spread spectrum theory and analyzed the advantages and main problems of the system
重点对电力线的扩频通讯系统做了大量的实验和研究，分析了扩频载波技术在电力线通信系统中的优势和主要问题，并提出了延长电力线传输距离的措施和方法。 |
| 5. | The article proposed a technical solution to the application of low voltage electricity lines carrier distribution transformers the area users identify devices designed programme , a detailed account of the operating principles of the devices and hardware
摘要提出了一种应用低压电力线载波技术解决配电变压器台区用户识别装置的设计方案，详细介绍了该装置的工作原理和硬件组成。 |
| 6. | Alcatel has made available a passive optical network equipment . designed as a broadband access technology or overlapped network for newly built residential zones , such equipment will be used as supplement to dsl and digital loop carrier technology
Alcatel推出一种无源光网络设备，定位于作新建住宅小区的一种宽带接入技术或作为一种重叠网络，作为对dsl和数字环路载波技术的补充。 |
| 7. | The electric wire high frequency carrier wave technology is very important and widely used in electric power industry and other fields . however the existing testing instruments for high frequency carrier wave channels are lagged and in creasing need for improving
电力线高频载波技术在电力行业和其它相关领域得到了广泛应用，具有十分重要的地位，但现有的载波通道测试设备却比较落后，急待改进。 |
| 8. | Based on the power - line channel model , we analysis and simulate the performance of the varies communication technique under the real power - line circumstance . we point out that the high voltage power - line carrier communication technique is not fit to the low - power carrier communication circumstance
并对三种主要载波技术在电力线上的传输性能进行了仿真研究，给出了仿真结果，该基础研究对国内同行有较大的参考价值。 |
| 9. | With mc - cdma , each data modulated chip of the user specific spreading code is mapped onto a separate subcarrier after spreading and scrambling , so that the chips of the spreading code and , hence , the data symbol is transmitted in parallel on multiple subcarriers
Mc - cdma是将多载波技术应用于cdma中，兼具cdma和ofdm这两种技术的特点。在mc - cdma中，用户的信息符号先经过扩频、加扰，再将扩频序列的码片并行地在多个子载波上传输。 |
