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1. In this method, the raw data of I and Q channels is divided into blocks at first, then each block is transformed into time-frequency domain by 2D-RDGT (Two-Dimensional Real valued Discrete Gabor Transform) and the desired bits are allocated to each frequency plane, finally each frequency plane is quantized with BAQ.
该方法对I,Q两路原始数据进行分块,先对每一块进行二维实值离散Gabor变换(2D-RDGT),在时频平面内对各频率平面根据方差进行比特分配,然后采用BAQ量化各频率平面。
2. But in the application of BAQ, some trouble may encounter, one of these is fractional saturation of raw data.
根据数据的特点,提出了一种对传统BAQ进行改良的压缩算法——部分饱和BAQ。
3. A compression algorithm based on the traditional BAQ algorithm is presented, which can select different ways to quantify the raw data.
实验表明,这种方法在不改变压缩比的情况下,对存在一定饱和的数据都能提高4.5dB以上的量化信噪比。
4. Thailand BAQ 2008 by Clean Air Initiative Asia, Nov 12 – 14, 2008, Bangkok, Thailand.
泰国 BAQ 2008 by亚洲主动净化空气组织,将于2008年11月 12 – 14日,在泰国曼谷举行。
5. BAQ 2008 by Clean Air Initiative Asia, Nov 12 – 14, 2008, Bangkok, Thailand.
泰国 BAQ 2008 by亚洲主动净化空气组织,将于2008年11月 12 – 14日,在泰国曼谷举行。
6. Please explain the meaning of this abbreviation PGn; Baq
请解释图上这个缩写的意义。
7. The numerical experiments results show that when BAQ is used, the block size should be chosen carefully.
试验结果表明:BAQ算法在设计时,要合理选择数据分块尺寸;同时,对于测高精度要求较高且垂直基线较短的系统,量化位数应至少为4 bit。
8. The results show that AP algorithm is superior to BAQ algorithm at the same reduction ratio. Thereby AP algorithm preserves more information of amplitude and phase.
结果表明在相同压缩比下,该文给出的算法优于BAQ算法,保留了更多的信号幅度和相位信息。
9. The BAQ is adapted to the high dynamic range of SAR complex images and reduces the quantization error.
块自适应量化方法很好地适合复数图像数据动态范围大的特性,减小了量化误差。
10. The performance evaluation in signal domain of this BAQ algorithm based on signal to quantization noise ratio (SQNR) and RMS phase error is presented and the processed SAR image after encoding/decoding with this BAQ algorithm is given.
文中给出了算法在信号域内的信号对量化噪声比(RSQN)和均方根相位误差这两个性能指标的评估结果;并给出了SAR原始数据经BAQ处理后的成像结果;
11. SAR raw data compression or reduction using block adaptive quantization (BAQ) is studied in detail, and the nonzero mean characteristic of real SAR raw data is taken into account in BAQ processing.
研究了用块自适应量化(BAQ)算法压缩合成孔径雷达(SAR)原始数据,考虑了实际SAR数据的非零均值。
12. BAQ是什么意思
12. And then, based on the SAR raw data characteristic, TCQ is applied to the data after BAQ. This method utilizes convolutional encoding and signal space expanding to increase Euclidian distance between signals, and the gain of quantization is further improved.
该方法在考虑了SAR原始数据特性的基础上利用卷集编码和信号空间扩展来增大量化信号间的欧氏距离,进一步提高了量化增益,取得了较好的量化和抗误码性能。
13. The performance of TCQ seems to be higher SNR than BAQ in compressed data.
通过对SAR原始数据的压缩试验证明,TCQ算法较BAQ算法在压缩数据的信噪比上有较大的提高。
14. In this paper, a design method of the SAR raw data real-time compression system is presented which is based on FPGA and adopts the block adaptive quantization (BAQ) algorithm.
因此提出一种新算法,先对SAR原始数据做距离聚焦处理,使其在方位向具有较强的相关性,再沿方位向做线性预测,并对预测差值系列做块自适应量化。
15. On the basis of block adaptive quantization (BAQ) algorithm, an improved BAQ algorithm is put forward. Its performance is better on the condition of equal computational load.
在块自适应量化(BAQ)算法的基础上,提出了一种改进的BAQ算法,在计算量相当的条件下提高了性能。
16. The discrete cosine transform-optimal entropy-constrained block adaptive quantization (DCT-OECBAQ) algorithm is investigated. The optimal entropy-constrained algorithm is able to design the scalar codebook with an arbitrary bit rate. Its performance is better than that of the improved BAQ algorithm.
研究了离散余弦变换-最佳熵约束块自适应量化(DCT-OECBAQ)算法,最佳熵约束算法能设计任意码率的标量码本,该算法性能优于改进BAQ算法。
17. By examining the characteristic of complex image data, this paper presents an efficient compression method based on block adaptive quantization (BAQ) after removal of frequency redundancy.
通过考察复数图像数据的特性提出了在消除频率域冗余的基础上使用块自适应量化的SAR复数图像压缩算法。
18. This paper baq sed on the traditional processing technology of the Dai Nationality local cuisine bamboo shoot and obtained its modern processing technology.
基于西双版纳傣族风味笋的传统加工工艺,对其工艺和技术要点进行改进,以期获得风味笋的现代加工工艺。
19. On the basis of 1:250, 000 regional geological survey of the C ê gn ê sheet, this paper mainly study the microfabric deformation character and the metamorphism of the basement metamorphic series exposed at north of Baq ê n County, eastern Tibet.
论文以1:25万仓来拉幅区域地质调查为依托,主要研究藏东巴青县以北出露的基底变质岩系构造变形特征及变质作用。
20. Discovery of the basement metamorphic series north of Baq ê n County, eastern Tibet
藏东巴青县以北基底变质岩系的发现
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